A couple of forced induction questions

[Tinbender59]

First: can LT1 alum heads take 15:1 with ARP studs, I'm planning on 14.5:1 effective CR, but you know how that goes.

second: Gaskets I read the thread on head gaskets, and I'm lost there, to many abrevations!! lol

P.S. planning on a cobra SVT M112 SC on either 350 LT 0r a 383 LT build. "have Bridgport, can mill"

[SSlowBoat]

First: can LT1 alum heads take 15:1 with ARP studs, I'm planning on 14.5:1 effective CR, but you know how that goes.

second: Gaskets I read the thread on head gaskets, and I'm lost there, to many abrevations!! lol

P.S. planning on a cobra SVT M112 SC on either 350 LT 0r a 383 LT build. "have Bridgport, can mill"
First, why such high compression? What is the point? If your running a twin screw heat is gonna be your enemy. And you'd want as low compression as possible.

Second: why such a small blower? You're gonna max that thing out and go all nuts to build something that you're only gonna make 500 with.

Here's a page you should skim thru for some research. http://www.corneltechweb.com/superchargerweb.htm

Sadly I can't get ahold of him and never saw if he completed the whipple version, I have searched endlessly as Ltconvert picked up a whipple 2.9 from someone who made it work on a trans am then sold it off before dyno, and he wants to make it run. FYI the impala guys had a few custom kits made with lightning superchargers and didn't make heads spin. It was just the "cool" factor.

Head gaskets: cometic mls or multi layer steel. Reuseable. Handle abuse with boost.

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[Ryan Stout]

First: can LT1 alum heads take 15:1 with ARP studs, I'm planning on 14.5:1 effective CR, but you know how that goes.

second: Gaskets I read the thread on head gaskets, and I'm lost there, to many abrevations!! lol

P.S. planning on a cobra SVT M112 SC on either 350 LT 0r a 383 LT build. "have Bridgport, can mill"
CR is way high. I plan on 10.5:1 and that's with e85 even!

[Tinbender59]

First, why such high compression? What is the point? If your running a twin screw heat is gonna be your enemy. And you'd want as low compression as possible.

Second: why such a small blower? You're gonna max that thing out and go all nuts to build something that you're only gonna make 500 with.

Here's a page you should skim thru for some research. http://www.corneltechweb.com/superchargerweb.htm

Sadly I can't get ahold of him and never saw if he completed the whipple version, I have searched endlessly as Ltconvert picked up a whipple 2.9 from someone who made it work on a trans am then sold it off before dyno, and he wants to make it run. FYI the impala guys had a few custom kits made with lightning superchargers and didn't make heads spin. It was just the "cool" factor.

Head gaskets: cometic mls or multi layer steel. Reuseable. Handle abuse with boost.

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Why? Because I want too! I'm not planning on turning harder than 6k so the M112 Will be enough. This rig will be a DD / toy. If I have to drop the alum heads for iron, that's what I'll do. Thanks for the info is far. Any more ideas

[shownomercy]

Why? Because I want too! I'm not planning on turning harder than 6k so the M112 Will be enough. This rig will be a DD / toy. If I have to drop the alum heads for iron, that's what I'll do. Thanks for the info is far. Any more ideas

Prepare for a lot of popped HG, I would recommend something more forgiving that MLS in your case. A torched HG is cheaper than popped ring land. Get yourself a very very good tuner and baby steps out of the stupid rich low timing zone. I bet you find the limit of pump gas very very quickly.

IMO, a roots blower with no way to cool down inlet air, combined with a super high SCR is a recipe for disappointment.

[Formula218]

I wouldn't want that kind of compression without race gas, and i wouldn't want to DD a car on race gas. I had a DD grand prix GTP with a cam, blower swap, E85 and lots more and it got 8mpg city and 12hwy, i was at a gas station every 3 days and it got expensive fast even paying >$2 a gallon.

[blackbirdws6]

Sometimes doing something unique has its benefits. As for this idea, I think you are in for an underperforming and finicky setup.

Since you sound dead set on doing this, I would agree with SNM. Go with a non MLS gasket and an extremely good tuner.

[Tinbender59]

Prepare for a lot of popped HG, I would recommend something more forgiving that MLS in your case. A torched HG is cheaper than popped ring land. Get yourself a very very good tuner and baby steps out of the stupid rich low timing zone. I bet you find the limit of pump gas very very quickly.

IMO, a roots blower with no way to cool down inlet air, combined with a super high SCR is a recipe for disappointment.



the current plan Is just an idea, as such like I said I-R-Stupid when It comes to Superchargers. I am willing to "lower" my standards as it were if nessary, 8.5 static 11. effective, heck I dont know?? just would love to have the crazzy pull of a SC. I am addicted to G's lol. if it is going to be way stupid and insanly expensive, I'll have to pass anyway. just daydreaming to start with, just looking to get some help, and clarifiction on my Ignorance

I have built 8500 RPM 350's and a 400, the 400 was putting 550 on the ground, but 3 mpg wasn't to cool either. I know from the GTP that you can have a little of both worlds, deicent millage, and fun power. that is what I am after.

this is going into my 1976 ElCamino, that I am doing a light restore on. If I did a complete restore I would not be able to move it out of the shop, lol. as it stands right now It will get a LT1 (1996 Vette) with Tuned Port Injection (1986 Camaro) and a 2002 LS1 ECU that I will be tunning this is a proven system ( http://www.gmtruckcentral.com/articles/lt1swap.html ). this system until I am confident enought to start a SC build. I guess you could say I'm not ignorant, just not schooled on this subject.

[shownomercy]

Turbo it.

No one likes supercharger whine anyway.

[Ccreddell]

No one likes supercharger whine anyway.

Thats not quite true.....

[popo8]

What kind of numbers are u looking for?

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[popo8]

Turbo it.

No one likes supercharger whine anyway.
http://images.tapatalk-cdn.com/15/11/24/8c7316a0884290ee96010679ccfd2350.jpg

Rightttt... cause we like our cars running. ;)

LTXtech.com IS my drug...
OWNER/ADMIN

[shownomercy]

http://images.tapatalk-cdn.com/15/11/24/8c7316a0884290ee96010679ccfd2350.jpg

Rightttt... cause we like our cars running. ;)

LTXtech.com IS my drug...
OWNER/ADMIN

May not be running, but its ran faster than some :p

[Tinbender59]

well I guess that I'm going to hold off for a while on this Idea y'all done worried me to much, I cant afford to loose a motor anytime soon. I'll stay with what I know for now.

[SSlowBoat]

the current plan Is just an idea, as such like I said I-R-Stupid when It comes to Superchargers. I am willing to "lower" my standards as it were if nessary, 8.5 static 11. effective, heck I dont know?? just would love to have the crazzy pull of a SC. I am addicted to G's lol. if it is going to be way stupid and insanly expensive, I'll have to pass anyway. just daydreaming to start with, just looking to get some help, and clarifiction on my Ignorance

I have built 8500 RPM 350's and a 400, the 400 was putting 550 on the ground, but 3 mpg wasn't to cool either. I know from the GTP that you can have a little of both worlds, deicent millage, and fun power. that is what I am after.

this is going into my 1976 ElCamino, that I am doing a light restore on. If I did a complete restore I would not be able to move it out of the shop, lol. as it stands right now It will get a LT1 (1996 Vette) with Tuned Port Injection (1986 Camaro) and a 2002 LS1 ECU that I will be tunning this is a proven system ( http://www.gmtruckcentral.com/articles/lt1swap.html ). this system until I am confident enought to start a SC build. I guess you could say I'm not ignorant, just not schooled on this subject.
Using the tpi setup is going backwards. Those things choke so bad above 4k it's not even funny. You will make better power and rum better with a lt1 manifold, drill it if you want a dizzy

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[gmpowered]

I'd look into a TVS the 112 pretty much sucks. Compared to the money spent the blower upgrade wouldn't cost that much more.
That article uses tpi because it is easier to run in a truck. For performance especially forced induction you would need a good tuning/pcm system.

[Tinbender59]

I'd look into a TVS the 112 pretty much sucks. Compared to the money spent the blower upgrade wouldn't cost that much more.
That article uses tpi because it is easier to run in a truck. For performance especially forced induction you would need a good tuning/pcm system.

it ran well in the truck it was a pullin beast. for Clarification (it is my build) :-) it did not fall off until 5k which is great in a truck. I'm going to start out with it in my elcamino, If it doesn't suit my needs I'll look into other avenues. thinking maybe a fuel injected tunnel ram??? it would have a good wow factor:drool::drool:

[superspirit]

Tinman, the TPI's run good in our trucks but for the el camino I'd go stock LT1 intake and 24x. I think you would be way happier with the out come. Or finish the dang magnatron!:)

[SSlowBoat]

Tinman, the TPI's run good in our trucks but for the el camino I'd go stock LT1 intake and 24x. I think you would be way happier with the out come. Or finish the dang magnatron!:)
Yeah whatever happened to that?

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[gmpowered]

it ran well in the truck it was a pullin beast. for Clarification (it is my build) :-) it did not fall off until 5k which is great in a truck. I'm going to start out with it in my elcamino, If it doesn't suit my needs I'll look into other avenues. thinking maybe a fuel injected tunnel ram??? it would have a good wow factor:drool::drool:

Im not arguing that it's your build you are also asking questions just lending some advice.
The reason its used in the truck is so the whole harness doesn't need a repin. The article also was not forced induction. I don't think you understand how important it is to have good engine management on f/I.
Also you seem to be confused with engine rpm vs blower choice, that has nothing to do with it. You need to look at blower rpm and ve efficiency. You move blower.rpm via pulleys. Google ve maps of blowers, outlet temps ect.
Again guys with half the displacement of a 383 get disappointed with a 112.

[Tinbender59]

Tinman, the TPI's run good in our trucks but for the el camino I'd go stock LT1 intake and 24x. I think you would be way happier with the out come. Or finish the dang magnatron!:)

well It is setting on my bench wating until I get a freekin day to finish it, I have found a better sensor - minimal supporting parts. I am in the process of building a 4L60E for my 1995 camaro (2/4 are failing fast). I might as well do the MagnaSpark and 411 swap while It is down. I did pick this Camaro up for my own test platform, since I pulled the LT out of the pickup. Dang it Superspirit!! THANKS FOR THE KICK IN THE ARSE!!! LOL I wish the camaro could take a vortec Distributor and TPI or be able to use the waterpump extensions, I would like a back up for the Maggie, I guess that means that I had better get it right?? LOL.

OK I'm on it planning on putting the camaro on the lift thanksgiving day, to get trans, 411 swapped in and "Finish!!! the Magnaspark". FINALLY

[popo8]

Im glad ur reconsidering this... a 15:1 boosted, roots set up on a daily driver...

Race gas is ur only option with that CR. I know 110 leaded here is $10/gallon. 113 leaded is about $14/gallon. Im guessing those octanes remain pretty uniform between states.

Remember N20 likes high compression. Boost does not.

At the same time ur 8.5:1 cr idea is gonna leave the car a little lazy till ur seeing boost amd rpms... although better than a turbo.

My camaro is 9.2 or 9.5:1 and sees about 10 lbs of boost. I run pump gas (93 octane) and I do DD it (unless Im rotating through all of the other vehicles).



LTXtech.com IS my drug...
OWNER/ADMIN

[Tinbender59]

Im glad ur reconsidering this... a 15:1 boosted, roots set up on a daily driver...

Race gas is ur only option with that CR. I know 110 leaded here is $10/gallon. 113 leaded is about $14/gallon. Im guessing those octanes remain pretty uniform between states.

Remember N20 likes high compression. Boost does not.

At the same time ur 8.5:1 cr idea is gonna leave the car a little lazy till ur seeing boost amd rpms... although better than a turbo.

My camaro is 9.2 or 9.5:1 and sees about 10 lbs of boost. I run pump gas (93 octane) and I do DD it (unless Im rotating through all of the other vehicles).



LTXtech.com IS my drug...
OWNER/ADMIN

lol I think I'll wate for my ship to com in, then I'll pick up a Vette with a supercharger on it from the factory. lol like Never!!!!

[Tinbender59]

P.S. I just ordered a $380 tool I need for setting up the MagnaTroniX, a portable dual trace Oscilliscope. just an FYI that I am serious about it!!!

better choice than the Supercharger I think!

[popo8]

lol I think I'll wate for my ship to com in, then I'll pick up a Vette with a supercharger on it from the factory. lol like Never!!!!
[emoji106]

LTXtech.com IS my drug...
OWNER/ADMIN