Engine Suggestions Please - The 1947 - Present Chevrolet & GMC Truck Message Board Network

PsRumors · 11-13-2006, 08:15 PM

I am getting impatient and tired of shopping and talking. GM has this ht383 that puts out 340 & 435. It is marketed as a truck engine. Thoughts? It is $4k.

watahyahknow · 11-13-2006, 09:26 PM

its a good engine , it has the vortec heads and the forced crank .

*Billla* · 11-13-2006, 10:01 PM

Quote:

Originally Posted by PsRumors

I am getting impatient and tired of shopping and talking. GM has this ht383 that puts out 340 & 435. It is marketed as a truck engine. Thoughts? It is $4k.

IMHO the dyno results say everything - peak torque around 3000 RPM with a curve that starts low and doesn't go flat until 3000 RPM and peak HP at 5000 RPM. Wouldn't be my first choice in a truck by any means. The 435 is a bit better with a fairly flat torque curve, but the TQ peak is still at 4500 RPM or so. Any of these engines will work, you just may find they don't deliver what you want in terms of an increase in power.

PsRumors · 11-14-2006, 08:21 AM

Quote:

Originally Posted by Billla

IMHO the dyno results say everything - peak torque around 3000 RPM with a curve that starts low and doesn't go flat until 3000 RPM and peak HP at 5000 RPM. Wouldn't be my first choice in a truck by any means. The 435 is a bit better with a fairly flat torque curve, but the TQ peak is still at 4500 RPM or so. Any of these engines will work, you just may find they don't deliver what you want in terms of an increase in power.

Can you get power low on a 350 or 383? Everything I look at seems to make power own up. Will a small block do it?

This one is marketed as a truck engine. The statements says it makes over 400 lbft of tq at 2500 (though the dyno says different).

AAAAAAAAAAHHHHHHHHHHH. I am going nuts.

*Billla* · 11-14-2006, 10:46 AM

Quote:

Originally Posted by PsRumors

Can you get power low on a 350 or 383? Everything I look at seems to make power own up. Will a small block do it?

This one is marketed as a truck engine. The statements says it makes over 400 lbft of tq at 2500 (though the dyno says different).

AAAAAAAAAAHHHHHHHHHHH. I am going nuts.

Hey, it's just a learning process - relax and enjoy

ABSOLUTELY an SBC can make power down low, especially a 383. It's really a function of the cam more than anything else, although the port size of the heads, intake and exhaust are certainly factors. Again, I think you'd do fine with one of the stock crate engines with a cam change, or you could work with someone like Chad Golen to build a crate engine that's perfect for your truck.

I can't really reconcile the dyno data vs. the marketing statements - that's between you and GM :-D

11-13-2006, 08:15 PM	#1
PsRumors Registered User Join Date: Sep 2003 Location: Cartersville, Georgia Posts: 53	Re: Engine Suggestions Please I am getting impatient and tired of shopping and talking. GM has this ht383 that puts out 340 & 435. It is marketed as a truck engine. Thoughts? It is $4k. __________________ '85 K20 Suburban

11-13-2006, 09:26 PM	#2
watahyahknow Registered User Join Date: Jul 2006 Location: the netherlands europe Posts: 4,335	Re: Engine Suggestions Please its a good engine , it has the vortec heads and the forced crank . __________________ i got a job again and having fun at it too idea's for the trucks and the order of things to do are taking shape and get closer to being realized , a few more months and i be able to start building for real i complete 2 of the trucks intoo running fashion one custom and one basicly stock the thirth will be sacrificed for parts



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