383 swap info

[99Yuk]

the ricers have the horses but not the torque. That is important to remember.

+1

My Trailblazer has the I6 4.2l. It has 275hp BUT only at 5000rpm after the second cam comes online. Until then, it's a dog. So even though it is supposed to have more HP than our trucks, it feels slow and lethargic at lower rpms. I find myself winding it up past 4k in the city to accelerate at the same rate that I'm used to with my truck..

IDK, but I figure that in my truck, I can beat an OEM 4cyl import while towing another import...off the line for a short distance... That's got to count for something!

TQ > HP at least for me...

 

[bowtiefreak]

It does come down to torque. My number were at the TIRES. I have heard anywhere from a 24%-34% drivetrain loss, 24% sounds about right. My motor only makes about 350HP at the flywheel, but close to 500lbs torque at the motor. In a big heavy truck that makes the difference. HT is the High Torque motor, not a high compression high HP motor. This is a daily driver engine that never has issues and can run on 87 octane fuel.

You could build up a hot 383 for the same mabye less cost but it would not be a bolt in, the fuel needs to be upgraded. I run the stock injection, it is about maxed out but we could cam teh truck with no issues and have enough fuel.

So the HT383E is close to 100 more HP and torque. IMO, that is huge for a drop in crate motor with ZERO issues.

---------- Post added at 07:11 AM ---------- Previous post was at 07:04 AM ----------

not bashing what so ever cuz you definitly have alot more money and time in your rig than i do , but is that all that a 383 pushes out? i mean i guess my ? is with a bigger stroke and more cubic inches i would expect at least in the 290s im no performance guru by no means but with a tune and all the boltys i would imagine that engine to be a little more peppy? maybe im just ignorant to the logistics of what i am talking about but i would think you should be in the 300s, because i as well was thinking of doing this swap myself but with the amount of money do you think its better just to go with a bigger block ? say a 454 out of a junkyard and have it rebuilt?

Ever looked at the number from a 454 that came in the trucks? You will be dissapointed. Chevrolet 454 SS - Short bed, standard cab, two-wheel drive Chevrolet C-1500 pickup with modified suspension, drivetrain, and a killer 7.4 liter (454 cu. In.) big block V-8 with 255hp at 4000 prm and 405 pound-feet of torque at 2400 rom.

 

[SunlitComet]

SunLit, I think that PCM4L removes the TM. At least they did the 100% TM reduction for my Wife's trailblazer, so I can't imagine why they wouldn't do it on an in person tune for him...

I am just now getting into it but from what I see is that the amount of torque is an adjustable user preference. Bowtie's might have been cut completely like on yours as you said, I just did not catch it if it was mentioned. Like I said I am just now studying the tune side of thing but when I look at the difference in torque on Bowtie's tune again it does look good.

---------- Post added at 05:57 AM ---------- Previous post was at 05:54 AM ----------

So the HT383E is close to 100 more HP and torque. IMO, that is huge for a drop in crate motor with ZERO issues.

I am sold just need to buy one.

 

[gpracer1]

the ricers have the horses but not the torque. That is important to remember.

It doesnt matter if I am in my Vette or Tahoe, I tell all the ricers the same.....My lugnuts have more torque than your engines.

Always gets em riled up.

 

[bowtiefreak]

^^ ha-ha

 

[SunlitComet]

I like that.

 

[blueflamed03]

in these, TQ hands down over HP anyday.

 

[Donnie Yukonie]

[QUOTE

Ever looked at the number from a 454 that came in the trucks? You will be dissapointed. Chevrolet 454 SS - Short bed, standard cab, two-wheel drive Chevrolet C-1500 pickup with modified suspension, drivetrain, and a killer 7.4 liter (454 cu. In.) big block V-8 with 255hp at 4000 prm and 405 pound-feet of torque at 2400 rom.[/QUOTE]

ouch i didnt know that i thought they came with like 390 hp , and that is true about my buddies civic he never told me how much torque he had going probally not much and i wasnt thinking of the things you did to keep it somwhat fuel saving so it can remain a DD

 

[bigfeet]

I can't wait to do the swap. Are there two different 383's offered? I think I saw one ht383e and one ht383? Whats the difference?

 

[SunlitComet]

the e version is emissions legal in all but about 6 states. I am sure it will pass in others but they might not have tested in those states or requires some minor tuning to comply.