Throttle Body
Safety Car
Joined: Oct 2000
Posts: 4,949
Likes: 10
From: Monticello MN
Originally Posted by adf
I recently purchased a 99 C5 and a couple of mods were done at that time i.e. K&N dual air intake,borla cat back.i have added ls6 intake manifold and a 160 degree thermostat. I am considering a BBK 80 TB and Granatelli MAF sensor. Am I wasting my money to get the additional HP? I am heading to Summit racing in Akron tomorrow to receive a 10% discount on special event day. My goal is to only go a little faster at a local dragstrip. I am not a serious racing guy. just for kicks! thanks out there. i am new to all this at the ripe age of 55.
I'd forget the Granatelli, if I were you. Spend your money somewhere else.
Ed
Burning Brakes
Joined: Aug 2003
Posts: 1,070
Likes: 9
From: MARRIOTTSVILLE MD
Originally Posted by adf
I recently purchased a 99 C5 and a couple of mods were done at that time i.e. K&N dual air intake,borla cat back.i have added ls6 intake manifold and a 160 degree thermostat. I am considering a BBK 80 TB and Granatelli MAF sensor. Am I wasting my money to get the additional HP? I am heading to Summit racing in Akron tomorrow to receive a 10% discount on special event day. My goal is to only go a little faster at a local dragstrip. I am not a serious racing guy. just for kicks! thanks out there. i am new to all this at the ripe age of 55.
same ETs at the track but my trap speeds were 1 mph higher. I think
that I might have gained a couple of horsepower up top at the expense
of loosing some torque down low. I also tried several different MAFs
that actually made me go slower so that was a waste of money too.
I would stick with the stock TB and MAF and spend your money some
where else like on a good dyno tune instead.
INTHERED
Last edited by INTHERED; Sep 9, 2005 at 11:54 AM. Reason: english
Racer
Joined: Aug 2004
Posts: 482
Likes: 80
From: Florida, Tampa Bay
Probably not worth the time and effort for a homebrew unless you've got access to a nice machine shop but here is a link showing how and why the blade clearance is not affected.
http://www.ls1camaro.net/sections.ph...ticle&artid=16
http://www.ls1camaro.net/sections.ph...ticle&artid=16
Burning Brakes
Joined: Oct 2004
Posts: 1,224
Likes: 0
From: Rowayton Ct.
Originally Posted by vettenuts
I got mine ported by Mark Shaner. Very nice work for $170.
I'm thinking of going to the FAST intake manifold, which, I think, can take a 90mm TB.
Thanks,
Safety Car
Joined: Mar 2002
Posts: 4,928
Likes: 1
Cruise-In V Veteran
St. Jude Donor '09
Porting the 78 mmTB smoothes and increases the diameter of the inlet side. It does not increase the blade size (78mm) or the blade/closed seat area. Going from a 78 mm to 90 mm TB increases the cross sectional area by about 33 %.
Fast is available as 78 or 90 mm. I wouldn't waste my time with the 78mm - Go for the 90 mm.
Fast is available as 78 or 90 mm. I wouldn't waste my time with the 78mm - Go for the 90 mm.
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Instructor
Joined: May 2005
Posts: 229
Likes: 0
From: "Second place is just the first loser" Edmond, Oklahoma
Originally Posted by RedRider98
On a stock car (except air intake and cat back) would there still be a noticeable difference or does it apply mostly to modded cars (heads, cams, headers, etc)?
I felt a HUGE difference when I went to a West Coast Corvettes TB (i think it's the same as the Lingenfelter) - it was amazing. But I already had the BPP bottom breather air intake and Halltech huge air bridge. I think it was the final 'bottleneck' for the air flow. But yesterday I bought a Shaner (on a trip to Dallas to pick up parts). Somewhere here on the forum someone had pictures comparing the LPE with the Shaner and the difference is night and day...... there is NO DOUBT the shaner is the best..... you can tell just by looking at the huge big mouth that it flows some air!..... the difference in throttle response between my LPE TB and original was phenomenal - can wait to install the Shaner (didn't have time today)....and he can mod your original for cheap. I can loan you one of my spares if you decide to send yours off for modding......... Shaner lives in Arlington - got his number.......
craig
ps- and sorry if this counts as hikacking a thread - hope not!
Instructor
Joined: May 2005
Posts: 229
Likes: 0
From: "Second place is just the first loser" Edmond, Oklahoma
and sure - if you want to spend big bux and go to a 90mm and more big bux for a FastX intake, it would get you more horsepower - no doubt. But for cheap and easy do it yourself HP, the Shaner TB is the way to go. ......... But your RedMachine is a daily driver and I don't THINK you go to the Tulsa Dragstrip very much.......... I'm putting mine on the silver daily driver....... it's not really being 'cheap' - call it the HP per dollar ratio! seeya
Pro
Joined: May 2004
Posts: 744
Likes: 0
From: St. Peters MO.
I installed the Mark Shaner unit and it gives you that nice clean response, as for the HP difference only a dyno will tell. I have read several posts on the Shaner TB and on C5's a 3-5 hp change seems to be the gain, depending on mods.
The change in the response is worth the money.
The change in the response is worth the money.