I'll take one just like that
lets design a top mount together!
Le Mans Master
Joined: Oct 2007
Posts: 6,149
Likes: 11
From: Greater Detroit Metro MI, when I'm not travelling.
The only "top mount" that comes to mind when I think Forced Induction was the top mount intercooler on my turbocharged Subarus. It made good sense on those cars because the flat 4 engine design allowed the space for it, and also dictated a very awkward turbocharger location which necessitates excessively long intercooler plumbing for a front mount to be used. In those cars the use of a top mount reduces turbo lag since there is less plumbing to pressurize, but it limits horsepower since you can't fit a very large IC under the hood, and also plagues them with spectacular heatsoak in traffic since the IC is sitting right over a 300F engine. On a Corvette there will never be enough space for a top mounted intercooler nor would it make any sense to use one.
If you meant top mounted supercharger then I would save myself the design work and purchase one of the fine units manufactured by Lingenfelter, Callaway, Magnuson, etc, and that's taking into account the fact that I have all the knowledge and skills necessary to fabricate one.
Race Director
Joined: May 2005
Posts: 15,960
Likes: 21
From: West Norriton PA
St. Jude Donor '08
I see you wasted no time moving on to the C6's. There was a top mount C6, I think it was yellow that was pretty neat looking.
I'll have to look thru my downloaded pictures for a copy.
Le Mans Master
Joined: Oct 2007
Posts: 6,149
Likes: 11
From: Greater Detroit Metro MI, when I'm not travelling.
Still curious about what kind of top mount we are talking about here...
Callaway made a twin turbo C4 that had the intercoolers top mounted due to space constraints in the bumper. It made pretty mediocre power... 345HP from a 5.7L cast iron twin turbo V8? I suspect the intercooling was wildly inefficient.
Callaway made a twin turbo C4 that had the intercoolers top mounted due to space constraints in the bumper. It made pretty mediocre power... 345HP from a 5.7L cast iron twin turbo V8? I suspect the intercooling was wildly inefficient.
Race Director
Joined: May 2005
Posts: 15,960
Likes: 21
From: West Norriton PA
St. Jude Donor '08
Still curious about what kind of top mount we are talking about here...
Callaway made a twin turbo C4 that had the intercoolers top mounted due to space constraints in the bumper. It made pretty mediocre power... 345HP from a 5.7L cast iron twin turbo V8? I suspect the intercooling was wildly inefficient.
Callaway made a twin turbo C4 that had the intercoolers top mounted due to space constraints in the bumper. It made pretty mediocre power... 345HP from a 5.7L cast iron twin turbo V8? I suspect the intercooling was wildly inefficient.
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Melting Slicks
Joined: Sep 2004
Posts: 3,153
Likes: 114
T4 flanges (GT40rs would be a killer setup)
Big front mount/charge cooler optional
turbo blanket
ceramic coated everything
THick walled stainless construction (the thicker the better)
V band clamps
3inch downpipes
External gates
lots of nice shiny heat shields....to keep everything cool odviously!
that should be enough to make it about a $15K kit! lol
Chris.
PS. how about cast manifolds???
Big front mount/charge cooler optional
turbo blanket
ceramic coated everything
THick walled stainless construction (the thicker the better)
V band clamps
3inch downpipes
External gates
lots of nice shiny heat shields....to keep everything cool odviously!
that should be enough to make it about a $15K kit! lol
Chris.
PS. how about cast manifolds???
Team Owner
Joined: May 2001
Posts: 36,175
Likes: 2,511
From: ...tearing up the highways, one state at a time™®©
Clearly, you have no idea what you are talking about when discussing the Callaway Twin Turbo. Yes, you menton one number and it is true for 1987, the CTTC made 345hp (115 more than stock) however, it made MUCH more torque!
The car in the picture, is a 1991 CTTC and it made 525 horsepower and 675 lb ft-torque across a power curve as flat and broad as the Mid-West plains.
One of my CTTCs, recently laid down 450rwhp and 600 rw torque
Not too bad for 1980s technology
The car in the picture, is a 1991 CTTC and it made 525 horsepower and 675 lb ft-torque across a power curve as flat and broad as the Mid-West plains.
One of my CTTCs, recently laid down 450rwhp and 600 rw torque
Not too bad for 1980s technology
Still curious about what kind of top mount we are talking about here...
Callaway made a twin turbo C4 that had the intercoolers top mounted due to space constraints in the bumper. It made pretty mediocre power... 345HP from a 5.7L cast iron twin turbo V8? I suspect the intercooling was wildly inefficient.
Callaway made a twin turbo C4 that had the intercoolers top mounted due to space constraints in the bumper. It made pretty mediocre power... 345HP from a 5.7L cast iron twin turbo V8? I suspect the intercooling was wildly inefficient.
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 8,863
Likes: 86
From: PA
St. Jude Donor '08
good replys!
had a good phone conversation with JZ@forcedinductions.com
here is what we discussed.
my current setup runs a E compressor cover, the inlet is 3" and the discharge is 2". he has small S covers that run 4" inlet and 3" discharge and will allow up to 78mm wheel! what is nice though is that this cover can except all the way down to a 66mm. very expandable!
yes quality S.S. from Burns out in Cali. will be manditory. wanna make the headers somewhat like a shortie style. then a mid pipe will connect the shorties to the headers. all this will be v banded.
the intercooler will also be as large as possible and place as far forward and upright.
it would be nice not to relo the alternator. looking at the ohio forcedinduction kit they didnt but then there is no DP to contend with w/there kit. if we can find and easy way
to move the abs unit forward then we can run a gto style alternator down low, BANG we are be in biz! not sure that all that will be possible/feasible...it might just be easier top relo and run ND 120 alternator.
had a good phone conversation with JZ@forcedinductions.com
here is what we discussed.
my current setup runs a E compressor cover, the inlet is 3" and the discharge is 2". he has small S covers that run 4" inlet and 3" discharge and will allow up to 78mm wheel! what is nice though is that this cover can except all the way down to a 66mm. very expandable!
yes quality S.S. from Burns out in Cali. will be manditory. wanna make the headers somewhat like a shortie style. then a mid pipe will connect the shorties to the headers. all this will be v banded.
the intercooler will also be as large as possible and place as far forward and upright.
it would be nice not to relo the alternator. looking at the ohio forcedinduction kit they didnt but then there is no DP to contend with w/there kit. if we can find and easy way
to move the abs unit forward then we can run a gto style alternator down low, BANG we are be in biz! not sure that all that will be possible/feasible...it might just be easier top relo and run ND 120 alternator.
Le Mans Master
Joined: Aug 1999
Posts: 8,827
Likes: 10
I think it goes without saying, the manifolds need to be cast - similar to the APS manifolds!
I'm all for innovation (and I'm the LAST guy to **** on anyone's parade!!), but why the desire top mount when APS and TTi have already proven they are great products? Just trying something different?
Either way -
!!!!
Mr. Big covered just about everything I was going to say the kit needed (short of the manifolds I mentioned above). However, I'd like to go on record as saying that the GT-35's are the biggest you're going to want to offer!!! GT-40's will spool just a little bit too slowly for the average person to enjoy on a 427 or smaller motor.
I'm all for innovation (and I'm the LAST guy to **** on anyone's parade!!), but why the desire top mount when APS and TTi have already proven they are great products? Just trying something different?
Either way -
!!!!Mr. Big covered just about everything I was going to say the kit needed (short of the manifolds I mentioned above). However, I'd like to go on record as saying that the GT-35's are the biggest you're going to want to offer!!! GT-40's will spool just a little bit too slowly for the average person to enjoy on a 427 or smaller motor.
Melting Slicks
Joined: Sep 2005
Posts: 2,521
Likes: 146
From: Watertown CT
I think it goes without saying, the manifolds need to be cast - similar to the APS manifolds!
I'm all for innovation (and I'm the LAST guy to **** on anyone's parade!!), but why the desire top mount when APS and TTi have already proven they are great products? Just trying something different?
Either way -!!!!
Mr. Big covered just about everything I was going to say the kit needed (short of the manifolds I mentioned above). However, I'd like to go on record as saying that the GT-35's are the biggest you're going to want to offer!!! GT-40's will spool just a little bit too slowly for the average person to enjoy on a 427 or smaller motor.
I'm all for innovation (and I'm the LAST guy to **** on anyone's parade!!), but why the desire top mount when APS and TTi have already proven they are great products? Just trying something different?
Either way -
!!!!Mr. Big covered just about everything I was going to say the kit needed (short of the manifolds I mentioned above). However, I'd like to go on record as saying that the GT-35's are the biggest you're going to want to offer!!! GT-40's will spool just a little bit too slowly for the average person to enjoy on a 427 or smaller motor.
Without comparing kit against kit as the TTi and APS kits are great choices I think there are a couple plus's to the top mount.
1) If designed like Nick said it will allow for easy and quick turbo swaps and just ease for working on the car as the turbos will be removed via v-bands.
2) Keeping the turbo's as close to the manifolds and the piping as short/direct as possible is a good way to produce more HP or at least do it more efficiently
3) Open the hood on an APS or TTi kit, not much to see. Open it up on a top mount, it's a work of art. Now I understand that is only for some, some people are all go, some are all show, some are a combination of the two.
Of course top mounts have their draw backs but having options for turbo kits I don't think is ever a bad thing. Personally I think the PTK kit for the C5 was the baddest turbo klit ever produced for the C5. And that's coming from a proud owner of an APS TT C5.
Just my opnion though.
Dan
Le Mans Master
Joined: Oct 2007
Posts: 6,149
Likes: 11
From: Greater Detroit Metro MI, when I'm not travelling.
Clearly, you have no idea what you are talking about when discussing the Callaway Twin Turbo. Yes, you menton one number and it is true for 1987, the CTTC made 345hp (115 more than stock) however, it made MUCH more torque!
The car in the picture, is a 1991 CTTC and it made 525 horsepower and 675 lb ft-torque across a power curve as flat and broad as the Mid-West plains.
One of my CTTCs, recently laid down 450rwhp and 600 rw torque
Not too bad for 1980s technology
The car in the picture, is a 1991 CTTC and it made 525 horsepower and 675 lb ft-torque across a power curve as flat and broad as the Mid-West plains.
One of my CTTCs, recently laid down 450rwhp and 600 rw torque
Not too bad for 1980s technology
Why do I sense a certain hostility in the above post? OK, so your aftermarket 5.7L twin turbo kit car makes 50 more hp than a bone stock, emissions compliant factory warranteed LS3. Woho. 80s technology? Ferrari was making 480 from a bone stock factory waranteed 2.9L engine in 1987. At 16PSI. Porshe tuner RUF got 480HP from a 3.2L 6 cylinder engine in 1987 using a single turbo. This is not ground breaking technology, so I don't see why you take exception to my claim that the output was "mediocre". My daily driver 2L Subaru dynoed in a 380 all wheel horsepower, and Mitsubishis routinely break 600 at the wheels from a factory displacement 2L 4 cylinder engine, so when I see twin turbos going into a V8 that is 3 times as big, I expect to see at least twice the horsepower
Last edited by PowerLabs; Sep 2, 2008 at 04:02 PM.
aka allbottle¬hrottle
Joined: Jun 2007
Posts: 13,759
Likes: 0
From: Brooklyn New York The DVL and the chicken sleep with the fishes....
St. Jude Donor '08
All I know Nick , after seeing your car run at Atco , I want the same one you got !!!
Just in time for my incoming 09
Just in time for my incoming 09
Team Owner
Joined: May 2001
Posts: 36,175
Likes: 2,511
From: ...tearing up the highways, one state at a time™®©
RPO B2K, as in, not aftermarket...
Why do I sense a certain hostility in the above post? OK, so your aftermarket 5.7L twin turbo kit car makes 50 more hp than a bone stock, emissions compliant factory warranteed LS3. Woho. 80s technology? Ferrari was making 480 from a bone stock factory waranteed 2.9L engine in 1987. At 16PSI. Porshe tuner RUF got 480HP from a 3.2L 6 cylinder engine in 1987 using a single turbo. This is not ground breaking technology, so I don't see why you take exception to my claim that the output was "mediocre". My daily driver 2L Subaru dynoed in a 380 all wheel horsepower, and Mitsubishis routinely break 600 at the wheels from a factory displacement 2L 4 cylinder engine, so when I see twin turbos going into a V8 that is 3 times as big, I expect to see at least twice the horsepower
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 8,863
Likes: 86
From: PA
St. Jude Donor '08
I think it goes without saying, the manifolds need to be cast - similar to the APS manifolds!
I'm all for innovation (and I'm the LAST guy to **** on anyone's parade!!), but why the desire top mount when APS and TTi have already proven they are great products? Just trying something different?
Either way -!!!!
Mr. Big covered just about everything I was going to say the kit needed (short of the manifolds I mentioned above). However, I'd like to go on record as saying that the GT-35's are the biggest you're going to want to offer!!! GT-40's will spool just a little bit too slowly for the average person to enjoy on a 427 or smaller motor.
I'm all for innovation (and I'm the LAST guy to **** on anyone's parade!!), but why the desire top mount when APS and TTi have already proven they are great products? Just trying something different?
Either way -
!!!!Mr. Big covered just about everything I was going to say the kit needed (short of the manifolds I mentioned above). However, I'd like to go on record as saying that the GT-35's are the biggest you're going to want to offer!!! GT-40's will spool just a little bit too slowly for the average person to enjoy on a 427 or smaller motor.
with turbonetics E cover ull be able to run 66mm up to 78mm!
the turbine will be the same that is on my car right now! slow spool?
blah hahahah hehehe...yeah 1.34 60ft on 16" drag radial
gt35 arent that aggressive....
Safety Car
Joined: Oct 2001
Posts: 4,945
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From: Dallas/Valley Ranch TEXAS!!!
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 8,863
Likes: 86
From: PA
St. Jude Donor '08
yeah if i ran S cover with same size turbine and compressor wheels as current it would make more power....i believe that the 2" charge is the bottle neck.
gt35 are a good turbo but certainly not the cats meow!
keep ur ideas coming!
i looked LB's old tread....
i think its important to keep the DP right under and close to the headers. i like LBs set up but i think its important to keep'm tight..
http://forums.corvetteforum.com/show....php?t=1776912
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 8,863
Likes: 86
From: PA
St. Jude Donor '08
T4 with .86ar and f1 turbine and e cover with 78 will be good for 1000 each.
its nice to know that u have a little bit of headroon if the 66mm are a little to timid...hehehe
its nice to know that u have a little bit of headroon if the 66mm are a little to timid...hehehe