gflo383

Hello, im new to this board, but i think i will learn alot from you guys here, i just bought an lt1 intake and plan to mod. it to work on my TPI. My question is, has anyone here done this, and what kind of power gains will i see? i have a 383,ATI procharger@ 12psi, intercooled,i have world products heads, edelbrock headers, probuilt 700R4, 3.73's..bla bla bla, i ran a best of 11.7 at 114 i think it was.... last spring, any ideas of what it should run after the new intake?

bigals87z28

yea man, there are gunna be a flood of guys tellin u to do a search... its ur best bet... tons of guys do the LT1 swap on the 383... hey i wana do it!... u got what i want... with a SC ... ahh man... .gotta be a kickass car.... well do a search on this board... u will find tons of crap....

Iroc n roll

Or you can just go to www.lt1intake.com This is John Millican's site. He helped me accomplish just what you what to do about a year ago.

RCR

Something like this?


(not on a 383, though )

Iroc n roll

You speed density guys have no idea how easy you have it.

GofasterFirebird

iTrader: (3)

Dude, plug wires??

Do a search. It took me a while. But I did much of it with a cordless dremel!!

STIFFLER

Thats quite the angle to hook up your air inlet.. holy do those LT1 intake's sit alot lower... is it worht it?

Iroc n roll

Yeah I'd say it's worth it. TPI really sucks to work on (took me hours to take off the TPI and only minutes to take off the LT1) and bites at higher RPMs, but I'm not going to start that here, there are plenty of other threads that more than cover it. It took a little wiggleing and cursing to get the boot on the right way but its really not all that bad. I'm thinking about just making my own intake but its not really a priority, it works great just the way it is.

72LT1VETTE

Hey RCR, why are you using the PCV in the valve cover instead of the PCV in the side of the intake? I'm in the process of the mod now and was wondering which PCV to use and why.

Iroc n roll

Well, I'm not RCR but I can answer the question. Even though I run the stock PCV system for the 85 (ie through the valve cover) the LT1 system is the way to go. It's much easier and creates much less of a mess. It's just one simple tube that hooks on one side of the manifold on both ends. With this you can eliminte all those extra hoses. And if you use fuel rail covers you won't even be able to see the little loop. Both systems will work fine though.

gflo383

so any ideas if i will gain much? as in HP, and 1/4mph & time?

Iroc n roll

TPI is very restrictive. It's saving grace is that at lower RPMs it has a higher air velocity which generates a impressive amount of torque. You have a Pro-charged 383....I don't think you're lacking at all in the torque or velocity department. However, you can only get so much air through the tubes. With a much less, restricive intake like the LT1 you're powerband will be shifted up to a higher more useable range. With your setup you'll get the best of both worlds. Search around for TRAXION's posts on the miniram (search for miniram or MR). He gives alot of excellent information on the intake (which is basically the same as the LT1 so everything still applies). If his spiel doesn't convince you that this is the greatest intake to have nothing will

bzznczzn

I have a question for you guys. Will the LT1 intake work with vortec heads?

Iroc n roll

One member on the board (steve?) did an a votec LT4 combo. I believe he specifically used the LT4 because the LT1 intake ports didn't match up to well. The LT4 had taller ports or more meat for cutting so he used that. He posted alot of his progress. Try searching around for a vortec LT4 combo.

72LT1VETTE

Hey Iroc n roll. When using the LT1 mounted PCV, do you put a "T" in the breather tube to the throttle body to supply both valve covers with air or plug the one on the drivers side?

gflo383

yeah, its a pro charger, i have plenty of torque, this car got a 2.2 60' with slicks at the track, i need more top end though, i think this intake will help alot but people on other boards are doubtfull. the reason i think it is such a good intake is because i see alot of aftermrkt intakes for TPI, but not one for LT1, must be good!

turtle

actaully thats a really slow 60ft for slicks being a 383 and charged. 1 thing the charger does is help overcome the tpi's week intake runners. but i agree the lt1 intake should help pick up the mph and knock off some et when its tuned out right.

i've seen fast charged tpi's and fast na lt1's but a charged lt1 will be faster then the tpi basicly.

Iroc n roll

72LT1VETTE: When using the LT1 PCV system you do not have to vent the valve covers. The vent is very simply accomplished by the loop which vents gases from the lifter valley and throws it into the intake stream to be combusted and disposed. You can seal both valve covers with the exception of an oil fill.

gflo383: Good observation. The lack of aftermarket intakes does tell you somthing about the LT1's effectiveness. It does not take an aftermarket intake to get LT1 cars into the 11's and 10's. The fact that LT1 cars achieve lower times so much easier than we TPI guys do tells you somthing.

turtle: Your right, that 60' doesn't match the setup. He should be running faster. There must be some other factor. Gflo383.. What TC are you running? What car do you have the engine in? What chip are you using? I think if you haven't done so yet a custom burned prom (after the LT1 swap of course) might be able to drop you into the 10's. Getting an 11.7 after a 2.2 60' is some hauling ***. Do you hook right off with the slick or do you have some traction issues?

gflo383

yeah, my 2.2 was just to show you that i have plenty of torque, i spin slicks is what i was saying. I have the stock prom... and stock stall converter, when i launch the car hooks for a split second then spins the hell out of em. i need a stall to bring it up in the R's and get a better launch/60'. i wish i knew how to burn proms, im sure i would be much faster... next spring, after the intake, i will probably doing some dyno tunning... till then its stored for the winter. thanks for the advice and help guys.

72LT1VETTE

THANKS Iroc n roll

Iroc n roll

No prob guys. Wow your roasting slicks! Dude, with the LT1 and some dyno tuning your gonna hit some really low 1/4 mile times. Hope you have a good rear end. Thats some serious power. Good luck with the car.

gflo383

thanks. i have already broken one rear this summer, i just got the car done last spring so its still kind of a project. the pinion gear shredded like it was made of sill puddy, hopefully these richmonds hold up a little better, need one more year of saving $$ to buy a 9"