Hey guys, I did a search but came up with no results. I have a GN with PT61BB turbo, 60# Inj., TT chip, 3" downpipe, exhaust dump, LS1 Maf, K&N filter, Scanmaster, Maf translator, new plugs wires and ignition coil, 3200 Vigilante converter, MT Slicks. Right now I'm running the stock intercooler, and I was wondering what kind of gains I would see if I switched to an RJC Front Mount Intercooler? My best 1/4 mile time: 12.50 @ 107
Horsepower gains from stock to Front Mount IC
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Not much at your power level. If you were to do cam and heads and run 25-30psi id guess about 80-100hp gain. Less than 20hp on you current combo though and adding a bunch of weight up front. You should be able to run 11.7-11.8@114-115 with 25-26psi with the combo the way it is.
The front mount its self wont give you any gains, BUT, will allow you to push things a little harder to produce more power.
The colder charge will make the biggest difference, allowing more boost and denser charge.
And yes there's a HUGE difference in charge temps entering the intake when going from a stock IC to a good front mount.
No, most good front mounts aren't going to add a "bunch" of weight to the front end. Wont make more than a few pounds difference over your stock IC, since the stock piece is so heavy with the cast end tanks and all.
The colder charge will make the biggest difference, allowing more boost and denser charge.
And yes there's a HUGE difference in charge temps entering the intake when going from a stock IC to a good front mount.
No, most good front mounts aren't going to add a "bunch" of weight to the front end. Wont make more than a few pounds difference over your stock IC, since the stock piece is so heavy with the cast end tanks and all.
Moving 20-30 lbs from the front of the engine to in front of the radiator is a bunch if you trig it out. Id bet its like moving the engine forward more than a few inches. Just more work to transfer the weight and keep it on the rear tires.
87TurboType
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Dude you just need to tune I have a smaller down pipe, smaller injectors, no exhaust dump and drag radails and ran 12:40 with very little tuning,
87TurboType
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Yes a buddy of mine ran 11:60's with everything you have the only thing different was the fmic and he had a te-44, I dont know what the difference is between yours and his, I only have a ta-49.
I know of at least 5 cars that picked up about .5 sec and 5 mph just going from a stock location ic (one stock, two stock big neck, one BGC stretch, one Spearco) to a front mount. This was several years ago, and included one Cottons, one PTE, and three CAS V2's. This was on cars starting from 13.2's (me, big neck to V2, got down to 12.7's before the next change to a bigger turbo) to 11.7's (Mike Hatley, BGC stetch to PTE, after retuning 11.2's). I'm a big believer 
.
You really need a better tuning tool, either direct scan or a power logger. That way you can see the fueling accurately all the way down the track, and not just a few frames of good, stable data at the top of 3rd gear. Also, what kind of rpm drop do you get on the 2-3 shift? With a stock cam that converter might be a little loose.
Your 12.50 at 107, was that on 93 octane pump gas (in which case it's very good with your combo) or some race gas? What boost?
.You really need a better tuning tool, either direct scan or a power logger. That way you can see the fueling accurately all the way down the track, and not just a few frames of good, stable data at the top of 3rd gear. Also, what kind of rpm drop do you get on the 2-3 shift? With a stock cam that converter might be a little loose.
Your 12.50 at 107, was that on 93 octane pump gas (in which case it's very good with your combo) or some race gas? What boost?
russgoodman
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I went from a best of 8.07 with the stock IC to a best of 7.87 with the FMIC (these were back to back passes, two separate nights - 1/8 mi of course). Track hadn't been ran on in a month due to rain, plus it was hot and humid, so I'm looking for a few more tenths with a prepped track and a cooler, less humid night.
benoitthegr8
Sociopathic TR Ownership
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Get a powerlogger, then get Alky... cheaper, and proven, that I/C would be overkill for your combo
Pronto
No amount of evidence will ever persuade an idiot.
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Buy a used Dutt neck and tune some more. See what happens. You can always resell the Dutt if want to go to the FM.
That was a major restriction in that combo. Looks like about 1 sec and about 10mph in the quarter
. Your making much more power than most on here.I hesitate to comment on this subject, because I know each vehicle is different. But, my stone stock, full bodied 87 T with dump went 12.80 on 275/15 street tires and 12.40's @108 with slicks; with a best of 12.20. All with 20 # of boost and good fuel. Transmission/converter was stock and 95,xxx miles. So again I hesitate, but check your tuning and look at your plugs. I pulled a plug after almost every run. They tell the story! And I later learned the hard way, bigger doesn't always mean better. Good luck and keep pluggin' away. Slowly!!! It will come.
That was a major restriction in that combo. Looks like about 1 sec and about 10mph in the quarter
Oh yes it was. It wouldnt go over 22psi when i put the ic on the boost went to 29psi. I turned it down to the same 20psi I was running and it picked up the 4 tenths.
I went from 12.20's to 11.60's on a te44 turbo by swapping the stock ic, to a bowling green customs stock location ic. I have bluetops, 3" thdp, restalled D5 convertor. Not much else, valvesprings and some other goofy sh*t, but otherwise stock w/ 168k heads have never been off. This was on 110 octane or better and about 25psi boost (28* timing).
Is this primarily a street car, drag car, and what is your goal with the car? Also are you going to keep that turbo for a while, or are you going bigger in the near future? The more you elaborate on your setup and your goals, the more everyone here will be able to help you.
Is this primarily a street car, drag car, and what is your goal with the car? Also are you going to keep that turbo for a while, or are you going bigger in the near future? The more you elaborate on your setup and your goals, the more everyone here will be able to help you.
