it's a l98 700r4, so in the future I should look into a tpis miniram. 
Turbo Question
Pro
Joined: Mar 2000
Posts: 658
Likes: 7
From: Perth Amboy New Jersey
With regards to this you are correct, but improperly or too small of a turbo and boost pressure will bleed down in the upper RPM's. so while you are correct in saying flow > boost, it is important to remember that boost equals the ability of the compressor to continuously feed flow to the motor. based on the combination you are showing, 67mm units in my opinion will be perfect with alot less lag than 76's, for drag, unless you are just trying to run for fun, i don't think twins fit into many classes so you wouldbe looking at either an 88mm to run in 275 competitions or 275X would allow you to jump into a 106mm single.
for a fun street car, the 67's would be the hot ticket!
Chris
for a fun street car, the 67's would be the hot ticket!
Chris
Pro
Joined: Mar 2000
Posts: 658
Likes: 7
From: Perth Amboy New Jersey
Planning 9 inch with a 3 Link/Watts Linkage, 4L80E transmission. I would love to put a 6L80E but, there is no aftermarket controller as yet for it. I'm not sure if it will fit. When I have the exhaust redone in about 2 months, some measurement will be taken.
Information I found:
Trans.....Overall Length.....Length to Mount.......Weight
4L80E.......32-5/8................26..................... .174 dry
6L80E.......29-1/4................25-3/4.................213 wet
Information I found:
Trans.....Overall Length.....Length to Mount.......Weight
4L80E.......32-5/8................26..................... .174 dry
6L80E.......29-1/4................25-3/4.................213 wet
Last edited by yedister; Sep 8, 2011 at 10:51 PM.
Safety Car
Joined: Apr 2001
Posts: 3,525
Likes: 2
From: Houston TX
Why do you not want to cut the hood. Mine is done. When done correctly, it is very neat and clean. You are just cutting the underhood support, not all the way through the hood skin.
F2R fits without cutting past the supports.
F2R fits without cutting past the supports.
Pro
Joined: Mar 2000
Posts: 658
Likes: 7
From: Perth Amboy New Jersey
Pro
Joined: Mar 2000
Posts: 658
Likes: 7
From: Perth Amboy New Jersey
I would like to hear more about your setup
Melting Slicks
Joined: Jun 1999
Posts: 2,872
Likes: 3
From: Wilmington NC
Yedister,
being you will drive the car mainly on the street with a few top speed events, i would lean towards the 67mm's, but thats me, i have done the bogger turbo laggy setups and they are fun but the lag is a killer and it requires you turn the motor quite high in the rev range. 67's would be hard pressed to get near 1800rwhp, but would likely hit the 1500rwhp mark. that is a ton of power to play with with a VERY broad power band hitting early on in the rev range.
to hit the 1800rwhp mark i agree that twin 76mm units would be the right choice if twins were what you wanted, for that gopal i would probably start leaning toward a big single. and keeping AC becomes a true challenge going to a single that large. It can be done but there would be significant work to the frame and front cross member to be done. I will see how a pair of 76's looks down low in the next week or so while I have mine in the air putting the 67's on. I am using smaller compressor housings to try and gain some room and on 76's that would kill the benefit of the larger wheel.
from a quick look I know the following to be a reality, if you go with midframe 76mm units, the factory motor mounts will not work, a custom motor mounting solution would be required as well as a customer tubular crossmember and the use of coil overs in the front to be able to remove the front leaf spring. I feel confident with these changes the upper portion of the accessory bracket could be maintaints for AC. a liquid to air intercooler setup would be required for the best efficiency as there simply wouldn't be enough room for the correct sized air to air core and the coolant and AC radiators. custom shrouding would also be required. again very possible but it would require significant work to accomplish.
I amdire your goals, I would say we think very similar in terms of power lol.
maybe we can talk some more about it once I begin putting the 67's on my 355cid setup. should be starting it mid next week!
Chris
being you will drive the car mainly on the street with a few top speed events, i would lean towards the 67mm's, but thats me, i have done the bogger turbo laggy setups and they are fun but the lag is a killer and it requires you turn the motor quite high in the rev range. 67's would be hard pressed to get near 1800rwhp, but would likely hit the 1500rwhp mark. that is a ton of power to play with with a VERY broad power band hitting early on in the rev range.
to hit the 1800rwhp mark i agree that twin 76mm units would be the right choice if twins were what you wanted, for that gopal i would probably start leaning toward a big single. and keeping AC becomes a true challenge going to a single that large. It can be done but there would be significant work to the frame and front cross member to be done. I will see how a pair of 76's looks down low in the next week or so while I have mine in the air putting the 67's on. I am using smaller compressor housings to try and gain some room and on 76's that would kill the benefit of the larger wheel.
from a quick look I know the following to be a reality, if you go with midframe 76mm units, the factory motor mounts will not work, a custom motor mounting solution would be required as well as a customer tubular crossmember and the use of coil overs in the front to be able to remove the front leaf spring. I feel confident with these changes the upper portion of the accessory bracket could be maintaints for AC. a liquid to air intercooler setup would be required for the best efficiency as there simply wouldn't be enough room for the correct sized air to air core and the coolant and AC radiators. custom shrouding would also be required. again very possible but it would require significant work to accomplish.
I amdire your goals, I would say we think very similar in terms of power lol.
maybe we can talk some more about it once I begin putting the 67's on my 355cid setup. should be starting it mid next week!
Chris
Pro
Joined: Mar 2000
Posts: 658
Likes: 7
From: Perth Amboy New Jersey
Yedister,
being you will drive the car mainly on the street with a few top speed events, i would lean towards the 67mm's, but thats me, i have done the bogger turbo laggy setups and they are fun but the lag is a killer and it requires you turn the motor quite high in the rev range. 67's would be hard pressed to get near 1800rwhp, but would likely hit the 1500rwhp mark. that is a ton of power to play with with a VERY broad power band hitting early on in the rev range.
to hit the 1800rwhp mark i agree that twin 76mm units would be the right choice if twins were what you wanted, for that gopal i would probably start leaning toward a big single. and keeping AC becomes a true challenge going to a single that large. It can be done but there would be significant work to the frame and front cross member to be done. I will see how a pair of 76's looks down low in the next week or so while I have mine in the air putting the 67's on. I am using smaller compressor housings to try and gain some room and on 76's that would kill the benefit of the larger wheel.
from a quick look I know the following to be a reality, if you go with midframe 76mm units, the factory motor mounts will not work, a custom motor mounting solution would be required as well as a customer tubular crossmember and the use of coil overs in the front to be able to remove the front leaf spring. I feel confident with these changes the upper portion of the accessory bracket could be maintaints for AC. a liquid to air intercooler setup would be required for the best efficiency as there simply wouldn't be enough room for the correct sized air to air core and the coolant and AC radiators. custom shrouding would also be required. again very possible but it would require significant work to accomplish.
I amdire your goals, I would say we think very similar in terms of power lol.
maybe we can talk some more about it once I begin putting the 67's on my 355cid setup. should be starting it mid next week!
Chris
being you will drive the car mainly on the street with a few top speed events, i would lean towards the 67mm's, but thats me, i have done the bogger turbo laggy setups and they are fun but the lag is a killer and it requires you turn the motor quite high in the rev range. 67's would be hard pressed to get near 1800rwhp, but would likely hit the 1500rwhp mark. that is a ton of power to play with with a VERY broad power band hitting early on in the rev range.
to hit the 1800rwhp mark i agree that twin 76mm units would be the right choice if twins were what you wanted, for that gopal i would probably start leaning toward a big single. and keeping AC becomes a true challenge going to a single that large. It can be done but there would be significant work to the frame and front cross member to be done. I will see how a pair of 76's looks down low in the next week or so while I have mine in the air putting the 67's on. I am using smaller compressor housings to try and gain some room and on 76's that would kill the benefit of the larger wheel.
from a quick look I know the following to be a reality, if you go with midframe 76mm units, the factory motor mounts will not work, a custom motor mounting solution would be required as well as a customer tubular crossmember and the use of coil overs in the front to be able to remove the front leaf spring. I feel confident with these changes the upper portion of the accessory bracket could be maintaints for AC. a liquid to air intercooler setup would be required for the best efficiency as there simply wouldn't be enough room for the correct sized air to air core and the coolant and AC radiators. custom shrouding would also be required. again very possible but it would require significant work to accomplish.
I amdire your goals, I would say we think very similar in terms of power lol.
maybe we can talk some more about it once I begin putting the 67's on my 355cid setup. should be starting it mid next week!
Chris
This is the Wilson Throttle Body
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Racer
Joined: Feb 2000
Posts: 488
Likes: 28
From: Peabody MA
Self contained oiling?
Is it possible to use a self contained oiling setup when using a rear mount turbo configuration? Basically, an oil tank, electric pump and other stuff all contained in the spare tire area?
I've never seen it done but I don't get out much
-Mike
I've never seen it done but I don't get out much
-Mike
Pro
Joined: Mar 2000
Posts: 658
Likes: 7
From: Perth Amboy New Jersey
Racer
Joined: Feb 2000
Posts: 488
Likes: 28
From: Peabody MA
Pro
Joined: Mar 2000
Posts: 658
Likes: 7
From: Perth Amboy New Jersey
There are so many changes in the Automotive world, you can thank the import guys for lots of the changes in turbo technology. The first time I heard/saw a Comp Turbo was at a NOPI event a few years back.
Pro
Joined: Mar 2000
Posts: 658
Likes: 7
From: Perth Amboy New Jersey
Heel & Toe
Joined: Jun 2005
Posts: 18
Likes: 0
