fast 78 intake?
Thread Starter
Joined: May 2011
Posts: 338
Likes: 0
From: kansas city,mo
fast 78 intake? Found one on Craigslist for 375 and was wondering if I would see any real gains over a ls6 intake. My car is full bolton,ms3 cam,4000 stall and 150 shot. I could sell my ls6 and almost get it for free,but would it be worth the hassle?
For 375 I'd be calling while I was warming up the car. In all seriousness, it's a better intake, easily ported, and maybe one day you'll find that dirt cheap 90mm with a cracked bottom b/c some idiot forgot the button head valley bolts.
Yes, get it now. It's worth power as is, but you can port the snout out to 85mm and it will get you ridiculously close to the power of a 90mm Fast intake or like dr whigham said you might find good deal later on a top 90mm shell and can turn yours into a 90mm.
no 90mm,TB. But you can put a 85MM TB on it, it only is 3 bolt remeber. I did that was a paper gasket and some epoxy on the stock Oring grove. worked great, I made the intake look stock, I posted some pics back 2005-2006 on here if you care to find them.
you can get a 85MM TB for cheap. I got a summit/PP one for free, needed some work with the IAC ported so it would work better, and the blade sticking. its a cheap Tb, no nice NW or anything, you can get them for under $200 I think.
you can get a 85MM TB for cheap. I got a summit/PP one for free, needed some work with the IAC ported so it would work better, and the blade sticking. its a cheap Tb, no nice NW or anything, you can get them for under $200 I think.
Am i the only one that didnt gain really anything from a ls6 to a fast 78? ... i ported it myself im sure im not the best porter around as it was my first time ever doing it(sanded down top shell and inner shell with 4 different grits of sandpaper progressively getting finer).. but really i gained only 5rwtq and i lost .5hp, Granted it was 2 different dynos but i got a re-tune on the second dyno with pretty much same numbers. I had a pretty big vacuum leak coming from the intake manifold but i addressed it now and im running a stock PP throttle body, is there something im missing for this 20rwhp lol? my tuner said most likely because im running a stock cam and out flowing it ?
i like the overall look and id say a fast is better then a ls6 but for me it didnt do anything for you it might... for 375 id jump on it asap!
i like the overall look and id say a fast is better then a ls6 but for me it didnt do anything for you it might... for 375 id jump on it asap!
Trending Topics
Am i the only one that didnt gain really anything from a ls6 to a fast 78? ... i ported it myself im sure im not the best porter around as it was my first time ever doing it(sanded down top shell and inner shell with 4 different grits of sandpaper progressively getting finer).. but really i gained only 5rwtq and i lost .5hp, Granted it was 2 different dynos but i got a re-tune on the second dyno with pretty much same numbers. I had a pretty big vacuum leak coming from the intake manifold but i addressed it now and im running a stock PP throttle body, is there something im missing for this 20rwhp lol? my tuner said most likely because im running a stock cam and out flowing it ?
i like the overall look and id say a fast is better then a ls6 but for me it didnt do anything for you it might... for 375 id jump on it asap!
i like the overall look and id say a fast is better then a ls6 but for me it didnt do anything for you it might... for 375 id jump on it asap!
If it was tuned with a vacuum leak the tune is now incorrect and it needs to be tuned again.
The rest of your combo does come into play, even if he doesn't gain anything with the stock cam and current exhaust etc, there will be room to grow with the Fast. On that note, you could have some other restriction before the intake or in the exhaust.
Either way for $375 it is a steal. On a bad day he can get $300 for his intake, on a good day he could break even.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo Hmm well I ran the car after the intake manifold and picked up .5mph but I went slower in the 1/4 I just think because I was running different tires and running out of gear I was within a .1 of my previous best on different wheels. Just worried something's wrong. I have a blacking SLP Lidn green air filter,descreened stock maf to a P&P stock TB , fast 78 (ported) stock heads/cam with crane 1.82 rockers, kooks long tubes/ catted Y too a 3in cutout. I feel everything is free flow and okay just had a vacuum leak then when the car would hunt for idle. Since then I cleaned the intake ports on the heads , ls6 valley cover and re seated the intake mani. Need to do a smoke test to verify no vacuum leaks but I'm pretty sure it's good.
Would lid/green air filter/maf/TB cause issues ?
Would lid/green air filter/maf/TB cause issues ?
I went from a ls1 intake to a ls6 to a fast 78 home ported. It seems the fast just likes to rev a little easier above 6200. No dyno numbers or track numbers yet. Bought it brand new for 500 bucks guy had it 8 years and never used it. So my ls6 intake for 325 so I am not into it that much.
You can get an adapter for a 90 MM TB, the lower on the 78 flows the same as the 90 upper. This is a good compromise if you cannot source a 90 upper down the road. The opening is tapered for smooth transition.
http://www.ebay.com/itm/221075198433
Wdbf!YIBMf!r,2eBg~~_12.JPG)
(B)5+NFBMf!rnCOQw~~_12.JPG)
http://www.ebay.com/itm/221075198433
Bullshit. The power to be had isn't from the throttle body opening, but from the runners themselves. He can get 350 shipped for his LS6 intake all day long, so he's out of pocket 25 bucks.
Pair that intake with a Shaner S3 TB and you have the best there is with a stock TB.
Pair that intake with a Shaner S3 TB and you have the best there is with a stock TB.
Bullshit. The power to be had isn't from the throttle body opening, but from the runners themselves. He can get 350 shipped for his LS6 intake all day long, so he's out of pocket 25 bucks.
Pair that intake with a Shaner S3 TB and you have the best there is with a stock TB.
Pair that intake with a Shaner S3 TB and you have the best there is with a stock TB.
I agree with you to an extent...I agree, the power in these FAST intakes is MOSTLY in the runner design, but the throttle opening does play a part.
All I'm saying is why settle? The FAST 90/92 will make more power than a FAST 78.
Agreed with that statement, but man... 375 for a FAST 78? When I had a 78, about 9 months ago, I paid 550 shipped. Coming 200 out of pocket didnt really bother me. 25 bucks out of pocket? Like I said, I would have called the guy while my car was in the driveway warming up.
can't believe people knocking this deal...i think its a good trade...and to not be out much money at all??? crap!!! do it man! those ported 78's dont do a whole lot worse that the 90/92's...
ive seen people on here spending more money on those professional products and weiand and bbk intakes that barely do better than an LS6...
ive seen people on here spending more money on those professional products and weiand and bbk intakes that barely do better than an LS6...
a Fast 78mm for $375 is an excellent deal, and if down the road the snout is opened up to 85mm like posted in the threads linked above, you will be hard pressed to prove it is giving anything up to a 90mm version