high compression LT1 guys

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Aug 18, 2008 | 11:23 PM

Dave J

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From: Toronto Canada

high compression LT1 guys

what are you using for starter motors.I just blew apart my 3rd stock one.compression is 13.7

Aug 18, 2008 | 11:51 PM

SVTJayhawk

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Quote:

Originally Posted by Dave J

what are you using for starter motors.I just blew apart my 3rd stock one.compression is 13.7

Wow,

how long did that motor last you?

I'm still learning LTx stuff, so I'm in for good tech advice.

Aug 19, 2008 | 12:03 AM

Quick96ss

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I have 12.0 to 1 compression With a Powermaster XS Torque Starter. It works Great!

Aug 19, 2008 | 01:25 AM

slagger

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powermaster here torque master it will crank up to 18-1
it has a gear reduction like 4-1 something like that and it cranks fast..

Aug 19, 2008 | 07:10 AM

Greaseymec

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From: San Antonio

Still doing well with a stock starter on 12.3 cr. No problems with a good ground and a fresh battery. I broke a few starters a while back. I mean I BROKE them. Hit the switch and after about 1/2 a rev the starter nose cone would go "clang" on the driveway. Turned out the opti cap was cross firing and really screwing things up. No problems after that (till the opti itself took a dump on the trailer at the LTx Nationals).

Mec

Last edited by Greaseymec; Aug 19, 2008 at 07:17 AM.

Aug 19, 2008 | 07:29 AM

BlackScreaminMachine

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From: Wallingford CT

w/ a 11.25 to 1 street comp, used CSR mini starter w/o issue.

Aug 19, 2008 | 07:58 AM

Tony Shepherd

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From: Round Rock TX

13.7:1 ?? Damn!

I am at 12.3:1 using an LT4 starter. Works fine. I am about to lower my CR to 11.5:1

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Aug 19, 2008 | 09:15 AM

Tony Shepherd

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From: Round Rock TX

Quote:

Originally Posted by Greaseymec

More Juce?

Mec

Higher quench, slightly less compression, E85 (maybe), and more juice.

Aug 19, 2008 | 09:25 AM

#10

Colin91Z

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From: Wichita/Derby, KS

11.8 : 1 here, stock starter, no problems.

Aug 19, 2008 | 10:03 AM

#11

Dave J

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I will give the powermaster a shot thanks for the help guys

Aug 19, 2008 | 10:30 AM

#12

slick1851

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Do you run on 100 or 110?

Aug 19, 2008 | 11:00 AM

#13

Dave J

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From: Toronto Canada

Quote:

Originally Posted by slick1851

Do you run on 100 or 110?

112 unleaded

Aug 19, 2008 | 12:06 PM

#14

TwoFast4Lv

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From: LT1 land...the "409" of the 90s!

PowerMaster XS also

12.5 to 1 with perfect quench

Aug 19, 2008 | 12:28 PM

#15

Fixxer99TA

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From: Melrose, MA

I am going to have to remember this, higher compression in the future. Good info here guys, looks like that PowerMaster XS is the way to go.

Aug 19, 2008 | 01:18 PM

#16

Kmaroman

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my car's compression is stock as far as i know. My bro told me to make some real boost use aviation fuel but put 2 stroke oil in with it to, cause Aviation fuel has no additive's

Aug 19, 2008 | 01:22 PM

#17

formulajunky

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From: Syracuse In

lol wow 13.7 thats high. powermasters are good though

Aug 19, 2008 | 03:52 PM

#18

Revelation Z28

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Quote:

Originally Posted by Kmaroman

my car's compression is stock as far as i know. My bro told me to make some real boost use aviation fuel but put 2 stroke oil in with it to, cause Aviation fuel has no additive's

only use 1 ounce of jetA in a tank. my dad used to use it in his jeep, and it never had clogged injectors

Aug 19, 2008 | 07:04 PM

#19

Greaseymec

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From: San Antonio

Quote:

Originally Posted by Revelation Z28

only use 1 ounce of jetA in a tank. my dad used to use it in his jeep, and it never had clogged injectors

Jet A is not gonna help any. Its really just a high grade kerosine.

Quote:

Originally Posted by Kmaroman

my car's compression is stock as far as i know. My bro told me to make some real boost use aviation fuel but put 2 stroke oil in with it to, cause Aviation fuel has no additive's

Be careful. Av gas is full of additives. Also, even the low lead stuff has WAY to much lead for O2 sensors and cats. 21 years in aviation. FWIW

Mec

Aug 19, 2008 | 09:24 PM

#20

Puck

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Quote:

Originally Posted by SVTJayhawk

Wow,

how long did that motor last you?

I'm still learning LTx stuff, so I'm in for good tech advice.

Reverse flow cooling means our heads are cooled first, allowing LT1s to run a lot higher compression then standard engines without detonation.

My rebuild will be shooting for 12.5:1, and my stock shortblock ran close to 11.1:1 on pump gas.

The tune makes a world of difference as well.

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