I have seen this done on some car and the thought made sense to me. Would it, however, kill torque on a nearly stock L98 (1.6 RR, Shorty headers, custom chip, CAI)? Should it affect mileage? If this is a good way to go, who mods these manifolds?

There is a guy that modifies the LT1 intake to fit the L98. This is his website
LT1 Intake - LT1intake.com

This seems like a kick-*** alternative to a mini-ram...half the price and you get a bit more runner length?? Awesome...

I was thinking of even throwing in an LT1 or LT4 cam. I think I might be pushing around 300-330 hp with that combo. Any Ideas on cams?

I fabbed my lt1 swap myself, didn't take all that long, the hardest part is the distributer spacer, when i got them machined i made 50 of them, so if anyone needs some, let me know. After its all said and done, i am very happy with it, i changed my cam to a 110LSA Comp Xtreme/ .503.510. It makes excellent power and pulls all the way past 6k, and its Cheap When you do it yourself! Ive got a picture of the swap on my 92 Z28, check out my garage.

How did you go about drilling for the distributor? I am interested in the nabbing a spacer if possible. Everything else seems pretty straight forward. Anything I need to be aware of if I am to attempt this myself?

Honestly, i used a good holesaw, just make sure its smaller than the hole, they tend to make a bigger hole that they are supposed to. I made a jig to mark out the hole, if you are slightly off, its ok because the spacer is forgiving, i only used coldweld on it and it works perfect, no problems at all, have the holes drilled already for the engine so you can bolt the intake on the motor, put your jb weld on the spacer and slip the distributer in where it needs to go, clamp it down, and overnight your distributer us exactly where you need it. The only other thing that screwed me was when i was making the bolt holes i didnt compensate for the gasket thickness so i had to file forever to get the bolts started, it was a pain, so when you mockup, make sure you have a gasket laying in place, and as always use some pst or silicone on the bolts, they will leak, i found out the hard way, if you want a spacer, pm me with your info i was trying to get 20$ shipped for them, let me know.

And he does a reall y great job on them. I've seen them and they really look good, workmanship is great too.

Actually, I think the LT1 is slightly shorter runner length if I remember correctly. However, the difference is minimal between the two intakes. Something like 1/2 inch difference in runner length between the two.

The other difference is the miniram has the thermostat housing part of the manifold whereas the LT1 manifold you have to use a remote thermostat housing.

I hope they have changed some things on the LT1 intake for the swappers now. I had problems with 3 different intakes trying to get them to seal around the water ports in the head. I had one of the first batch intakes and pulled it off about 5 times trying to seal it.

Finally gave up and got the miniram.

I have an LT1 intake sitting here and I'm wondering on what to do. It's off a '93 LT1.

What heads would be good for this intake? I already have a hotcam...

If you read that web site on the LT1 intake there is something about using a 93 intake. I dont think you can.

you cannot use the 93 intake. the fuel crossover is in the rear and that interfears with the distributor. There would be no room for it, You must use an intake with the fuel crossover in the front. they also say this on the Lt1intake.com website

93 intakes are the kind that you are supposed to stay away from because of the location of the fpr.

It took me alot of rescearch but i came across a gasket that was on the floor of advance auto, a mr gasket untra seal, little bit of indian head, no problems 10k later.

its worth doing the swap..the gains from 3800 to 5000+ are totally worth it once u really get teh fuel figured out for it. just boltin it on tends to run lean up top. my TPI peaked at around 4100rpms so its weak. LT1 will definately get it to pull to 5000-5300

I made a mistake, the intake I have is from a '95 LT1. It was the fuel rail the intake came with that was off a '93. I would still need to drill the distributor hole, get a spacer made, egr block offs, and elongate the middle holes on each side. And of course get a remote T-stat housing. I was going to do this setup last spring but decided against it and keep my TPI. It seems that everyone either ditchs the TPI for carb or a "better" intake setup nowadays so I thought why not keep the TPI and prove they can make good power. Next year with a few more goodies, I plan on having a high to mid 12 second N/A TPI engine. I know it's plausable.

How fast you think my current setup is now? I don't have a stall yet which is hurting me a great deal but I would like to know what I'd run with out and with a stall. I was told around 2600-2800 would be good for what I have and what I plan on doing. Mods are in sig...

Plans consist of Aluminum heads (Dart, Edelbrock), 1.6 rockers, Stall, bullet muffler, built 4thgen rear with 3.73's. I also want to have a C/R around 9.5:1-10:1 with the new heads. 1.6's with the hotcam would bring the lift up to .525/.525 instead of my current .492/.492. Obviously tuning would be a factor but that would also come with the new parts. If anyone is interested, my LT1 intake is for sale along with the '93 fuel rail and regulator. PM me with questions.

well my car is possibly a 13.6 car. has done 13.7s. all because of the stall. and i only have exhaust mods

without a stall now, your combo is probly mid 13's (13.4-13.5's) but at a higher mph than me. my buddy has full bolt ons and does 13.6s at 100 with 3.70 gears, no converter...1.93 60 foot street tires. yours should be abit quicker since u have a cam.
A converter like 2800 stall will get your car down to the low 13's with a good tune. hell it might even go high 12 as is but i think low 13's is about right. once u had heads and those rockers with a tune, that car will do high 12's off the launch. it will cut great 60 foots and still have some topend with the cam/modded TPI.

Sounds good to me. I just wanted to break into the 12's with what I have and then focus on other parts of the car. Suspension is almost done, tranny would be next on the list as I want either a T56 or a Tremec 5spd. Than I can focus on the look of the car. Anyway, back on topic...

here i did this swap onto my 383 i like the look of th intake and the cost compared to the miniram but the miniram install is MUCH cleaner.

pics of it on my cardomain.

1991 Chevrolet Camaro - Josh's Chevrolet

LT1 conversion or Vortec heads, w/TPI, or Fast Burn heads w/TPI? For me, the high RPM gains in the LT1 conversion aren't my primary concern. So, which would be better, in both mpg gain, and/or hp?

Scoggin Dickey has a Vortec fit TPI intake base, so that part is not a problem.

Looking at around $650 for a LT1 conversion, $950 for Vortec heads w/TPI, or $1200 for Fast Burn heads w/TPI.

Hmmm...I hadn't done the math before now...Fast Burn heads are out of my budget...Would the Vortec headed TPI be worth the $300 over a LT1 conversion?

the vortec heads would make some nice gains cuz they flow better than stock and have a good combustion chamber design. so they should be more efficient heads over stockers with TPI.

but TPI is still kinda a weak match for those heads. those heads will want to breath to 5500. TPI is good to maybe 4500. it be really nice to add LT1 to vortecs but its doubtful that could be done.

i'd still go LT1 conversion for the better airflow it can produce. it will make a flatter torque curve but you may lose some peak torque. but the overall hp gain will be worth it.

as far as MPG of each setup, i dont know. it will depend on the driving and tune for each

On the RPM note...I guess siamesed runners could replace the stock TPI runners, but that would just up the Vortec swap cost.

i'd think you would be really happy on how a ported TPI setup with siamesed runners would perform with vortec heads. it should make good power while gettin good mileage once its tuned great

anyone have a link for a direct article for the lt1 converion.. i have this in mind..

heres a good starting point
Swapping a LT1 intake into a 1st*** Gen Small Block Chevy

anything else, just search

Farther up in the thread, is a guy who preps the intakes for conversion. And there is a link to an article on it I think.

Hey do you know if this guy is still around? I've tried to e-mail him, but if anyones knows anyway of me getting an Lt1 intake..I'd like to know!
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Have you talked to anyone who mods them yet? I'd like one aswell, that's my plan. I have an L98 383 stroker...-Alex

He never replied to me either. You could always do the conversion yourself. Several people have.

.

Hey about those distributor spacers? What were they machined too? I'm gonna be modifying an Lt1 intake for my L98 aswell. What do you want for one?-Alex

Scott at LT1intake.com is the one who does the conversions now. He bought the business from John Millican (the original guy who developed the conversion) about a year ago. Scott has been real busy lately, working weird shifts, etc. from what I understand.

I've got one of the last intakes JohnM did before selling the biz to Scott sitting in my garage. Picked it up off eBay and then changed my mind about using it. I was going to put it up on eBay this week, but if you want it I can let ya have it for $300 shipped to anywhere in the continental US. I also take PayPal (prefer it actually) if you're willing to pay the extra 4% fee. Just let me know......


- Vern

Hey I'm interested. What does it include? Block off plates>? Distributor spacer? Coolant fittings? What heads is it drilled for?

Well, I think it's sold. Waiting on a confirmation from the buyer since I sent him pics before I shipped it (already paid for). If something falls thru, I'll let you know.

And yes, it included the block off plates, distributor spacer, and vertical coolant fittings. Was drilled for standard SBC ('87 and later) heads. Hole is slightly elongated, so '86 and earlier might work as well (can't guarantee that part though, never tried it)

Let me know, I'll send a payment tomorrow.

Hi,
do you know if this LT1 intake.com is out of business?
I'm interested in buying one intake for my car, and sended e-mail to scott, but he didin't answer, this was week ago...
Is somebody else making these conversions?
Would appreciate any information

-Pete

I guess so....He doesn't respond to anyone, apparently. I've had local friendsemail him, but no answers.

Yeah, It's been a month and I've heard nothing.
I'm thinking about making some to sell, I just finished mine!
I bought one of this intakes as a template, but decided to make my own.
If enough people are interested, I will possibly produce some. I'm not sure about prices?

I just got an email from Scott yesterday (or was it Thursday?). Anyway, he's gotten in a jam at work and is extremely tied up. Please be patient, he'll get back to you. LT1intakes is NOT out of business....

ok, lets wait up, although Holley stealth ram is getting more interesting...

Yes- the problem is the configuration of the FPR against the fuel lines. If you machine out the front top of the '93 manifold and get a crossover like the later model, you can use the '94 and later rail.

I'm not sure if the effort is worth it. It may come out ugly.

I agree, everyone prefers teh 94+ models. I wonder why though. The MiniRam doesn't have a front crossover for the fuel rail either, and folks love those intakes.....

for big power numbers, its best to have parrallel flow fuel lines, unline the stock LT1 rails

Yeah, but you can modify the stock fuel rails to make them run parrallel. Will a Y or a regulator fit back there with a distributor though?

By parallel do you mean MiniRam style, or later LT1 style, or something else completely?

I'm also assuming your comment "unline" was probably meant to be "unlike". Correct?

Please explain what you mean by "parallel flow fuel lines".

Do you mean splitting the input line and sending it to each rail? And then doing the same thing with the exit line to the FPR?

Inquiring minds want to know.....

Yes, that's what it means.

If he is going to continue to build these, you'd think he'd post a note as to them being temporarily out of production, but back in time. Or post something on TGO to let every one he's still alive. If you got email, that means he still has 'net access.

I know, I don't understand it either.....

I'm doing a lt1 intake conversion on an 85 vette with early style heads, anyone else running early bolt pattern heads? I do not like the bolt angle,any ideas on a easy way of getting a good bolting surface?Plus the two left side middle holes are about impossible,anyone have sucess running without those two bolts?