Post Your Dyno Numbers With A XE274
Thread Starter
Pro
Joined: Jan 2002
Posts: 624
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From: Marietta ga
It seems like most people feel that with a good fuel system and some timming retard a 150 shot is doable on a stock bottom end.
Originally Posted by korvetkeith
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
I had KB's smear the aluminum. It completely locked up the piston rings and sounded like rod knock. My buddy had a 383 with KB's and about his 5-6th bottle he had a piston break apart in the pin boss area. His had timing controls and some kind of knock sensor. He's been a N2O man for years. So I know that he had that figured out from previous motors. He just went cheap on the 383.
Thread Starter
Pro
Joined: Jan 2002
Posts: 624
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From: Marietta ga
WOW How big of a shot was he running on this motor. Do you know how much compression he had in his motor??
Originally Posted by gkull
I had KB's smear the aluminum. It completely locked up the piston rings and sounded like rod knock. My buddy had a 383 with KB's and about his 5-6th bottle he had a piston break apart in the pin boss area. His had timing controls and some kind of knock sensor. He's been a N2O man for years. So I know that he had that figured out from previous motors. He just went cheap on the 383.
Burning Brakes
Joined: Feb 2003
Posts: 1,246
Likes: 1
From: SouthBend IN
I have CLAIMER hyper's in my motor and spray it with a 200 shot, every now and then. I only spray the 200 about 4 -5 times a year, the rest of the time is a 100 shot when just taking people for a ride.
here's the do"S and dont's to make it live.
DONT
1- detonate it...instant death
2- don't over rev it....that's a slow death
3- IF you can have the builder give some extra ring end clearance
DO
1- retard the timing.
2- run 100 octane or higher with anything more than a 100 shot....a MUST
When I spray a 200 shot it's on straight 112 Sunoco , with a NGK 9 plug and 28 deg TOTAL timing. I also take the shift points from 5700 to 5000, Most spray motors will peak 500-700 rpm lower when on spray.
When i spray the 100 shot on pump gas ( 92-93) I run a autolite 3924 plug and 30 deg total timing.
here's the do"S and dont's to make it live.
DONT
1- detonate it...instant death
2- don't over rev it....that's a slow death
3- IF you can have the builder give some extra ring end clearance
DO
1- retard the timing.
2- run 100 octane or higher with anything more than a 100 shot....a MUST
When I spray a 200 shot it's on straight 112 Sunoco , with a NGK 9 plug and 28 deg TOTAL timing. I also take the shift points from 5700 to 5000, Most spray motors will peak 500-700 rpm lower when on spray.
When i spray the 100 shot on pump gas ( 92-93) I run a autolite 3924 plug and 30 deg total timing.
Le Mans Master
Joined: Mar 2001
Posts: 9,464
Likes: 1
From: Modesto CA
Cory,
Take a look at the CarCraft 350 HO motor build up. They got IIRC 425bhp out of a 350cid, 10:1, Vortec Headed, XE274, motor. That's the motor a friend of mine is putting in his 72 Chevelle. Should run great...even better in a lighter car, like yours.
EDIT: 440bhp
Engine
Take a look at the CarCraft 350 HO motor build up. They got IIRC 425bhp out of a 350cid, 10:1, Vortec Headed, XE274, motor. That's the motor a friend of mine is putting in his 72 Chevelle. Should run great...even better in a lighter car, like yours.
EDIT: 440bhp
Engine
Last edited by TIMSPEED; Jun 24, 2005 at 04:08 PM.
