Lt1 block + boost

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Mar 9, 2009 | 10:07 PM

rg96lt1

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Lt1 block + boost

How much horsepower can the LT1 block handle ? Callies crank , Lunati rods, diamond pistons , splayed caps, arp head studs , arp rod bolts, AFR 227 heads with a gt47-88mm turbo . I know im ok with the internals , just wondering on how much the block can take before cracking .

Mar 9, 2009 | 10:57 PM

NovaCain383

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From: C-Vegas

If if is poured, I have seen them upwards of 1000 FWHP.

Mar 9, 2009 | 11:06 PM

otherwhitemeat

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Quote:

Originally Posted by rg96lt1

at 900rwhp you get a summer out of it ...after that bearings wear out fast and lt1 heads don't support to much more anyway.....I got 1100rwhp out of my lt1....but it burns through bearings so...now its a dart block..SBC

Mar 9, 2009 | 11:51 PM

94dragbird

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From: Ottumwa, IA

I think there is one person over on camaroz28.com that went 1200 fwhp with a half fill and F1

Mar 10, 2009 | 08:22 AM

engineermike

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I'm at 900-950 fwhp and 17 psi boost. It's .060" over and has been together for a couple of years now.

Mar 10, 2009 | 10:00 AM

otherwhitemeat

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Yup....at about 900hp at the tire, and up...the motor won't last long. I think the block, even with fill, flexes to much...

Mar 10, 2009 | 10:35 PM

LT1_Fireman

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From: TN

355 is the way to go... I was 900~fwhp@ out of a 355 and D1(not d1sc) on my new setup I hope to make 1100~fwhp and I am staying 355 and going half-filled.And check this out...http://www.youtube.com/user/lcvette1, and here are the details...http://ltxtech.com/forums/showthread.php?t=2117

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Mar 10, 2009 | 11:35 PM

elias_799

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From: toronto ontario canada

i would save the money for an lsx block. a 427 maybe ? you get 6 bolt heads witch will prevent quite a bit of head lifting issues. and he block is proven to make over 2000whp.

Mar 10, 2009 | 11:38 PM

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otherwhitemeat

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Quote:

Originally Posted by elias_799

i would save the money for an lsx block. a 427 maybe ? you get 6 bolt heads witch will prevent quite a bit of head lifting issues. and he block is proven to make over 2000whp.

Just get a SBC dart block and be done with it..

Mar 11, 2009 | 12:14 AM

#11

LT1_Fireman

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From: TN

With the Lt1 block head lifting wont be the problem we have 5 bolts per cylinder and you can make good power without having to go lsx.(even tho I wish I would have.lol)

Mar 11, 2009 | 09:25 AM

#12

otherwhitemeat

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Quote:

Originally Posted by LT1_Fireman

With the Lt1 block head lifting wont be the problem we have 5 bolts per cylinder and you can make good power without having to go lsx.(even tho I wish I would have.lol)

yup i have seen 33psi with no issues and a buddy has seen just over 40 psi.... but the blocks strength and lt1 heads are an issue so,.. time for a dart block and much bigger heads...

Mar 11, 2009 | 09:13 PM

#13

Jditlfm

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From: Brockport NY

Otherwhitemeat, do you think a half filled 355 would live a long time at 900-1000 rwhp? If not how much hp could you get out of it while keeping it alive for about four years?

Mar 11, 2009 | 09:22 PM

#14

LT1_Fireman

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From: TN

Quote:

Originally Posted by otherwhitemeat

yup i have seen 33psi with no issues and a buddy has seen just over 40 psi.... but the blocks strength and lt1 heads are an issue so,.. time for a dart block and much bigger heads...

gosh how much power are you making?

Mar 11, 2009 | 09:32 PM

#15

elias_799

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From: toronto ontario canada

Quote:

Originally Posted by LT1_Fireman

With the Lt1 block head lifting wont be the problem we have 5 bolts per cylinder and you can make good power without having to go lsx.(even tho I wish I would have.lol)

i heard lt1's don't last for too long because they all like to eat bearing. could be wrong, i do not have much experience with LT series motors.

Mar 12, 2009 | 01:43 PM

#16

otherwhitemeat

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Quote:

Originally Posted by Jditlfm

Otherwhitemeat, do you think a half filled 355 would live a long time at 900-1000 rwhp? If not how much hp could you get out of it while keeping it alive for about four years?

It think 850ish rwhp might last a while...as long as there is zero detonation and your not into it too often.....bearings and rings wear out fast...i think the block flexes too much...

Mar 12, 2009 | 01:44 PM

#17

otherwhitemeat

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Quote:

Originally Posted by LT1_Fireman

gosh how much power are you making?

1100rwhp

Mar 12, 2009 | 01:56 PM

#18

96lt1m6

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From: LA$ VEGA$

http://videos.camaroz28.com/recentvi...c7016f0c46.htm

http://www.youtube.com/watch?v=9fGQiIlyHTM

stock weight

Mar 12, 2009 | 04:23 PM

#19

engineermike

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At ~950 fwhp, I can see evidence of cap-walk with a 4-bolt conversion, but that's the extent of damage. Going to a dart block isn't going to help that unless you dowel the mains.

Mar 12, 2009 | 04:33 PM

#20

otherwhitemeat

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Quote:

Originally Posted by engineermike

At ~950 fwhp, I can see evidence of cap-walk with a 4-bolt conversion, but that's the extent of damage. Going to a dart block isn't going to help that unless you dowel the mains.

It will help at 1300rwhp

... I have seen premature main bearing wear and ring wear. BTW, I have seen videos of factory blocks on the dyno, under some special camera and lights...you can watch them flex....it pretty bad! I try to find a link.