average HP of 383 all bore???
Thread Starter
TECH Veteran
iTrader: (6)
Joined: Feb 2002
Posts: 4,766
Likes: 0
From: Phoenix, AZ USA
average HP of 383 all bore??? I'm thinking of upgrading to a 383CI LS1 (actually 387CI...4.125" bore, stock 3.622" stroke crank) and was wondering what the average hp people are getting out of them.
With my stock short block 346CI running a TR224 I'm making 400rwhp (should hit 415HP or so when winter comes)
My goal has always been 500 rwhp (no nitrous) and it would be nice to do it without FI (all motor is just cool).
With my stock short block 346CI running a TR224 I'm making 400rwhp (should hit 415HP or so when winter comes)
My goal has always been 500 rwhp (no nitrous) and it would be nice to do it without FI (all motor is just cool).
Re: average HP of 383 all bore??? Check my post here at the middle of the internal engine section. I put out 511 rwhp thru a 12 bolt with 4.33's, it can be done. It's all in the heads and the tuning IMO.
Thread Starter
TECH Veteran
iTrader: (6)
Joined: Feb 2002
Posts: 4,766
Likes: 0
From: Phoenix, AZ USA
Re: average HP of 383 all bore??? YES!!!!! 
What are the specs of the cam?
How does the 12.2:1 CR work out for you on 91? I'm over here in Phoenix with 11.1:1 and I thought that was bad.
My car already has all the good bolt-ons (hooker LTs, x-pipe, ported maf, LS6 intake) and my heads are stage III, 5.7Liter heads with a 60cc chambers.
What are the specs of the cam?
How does the 12.2:1 CR work out for you on 91? I'm over here in Phoenix with 11.1:1 and I thought that was bad.
My car already has all the good bolt-ons (hooker LTs, x-pipe, ported maf, LS6 intake) and my heads are stage III, 5.7Liter heads with a 60cc chambers.
TECH Veteran
Joined: Aug 2002
Posts: 4,055
Likes: 1
From: Hartsdale, NY
Re: average HP of 383 all bore??? ....and how do you plan on getting a 4.125 bore?
..the only alternatives i know of are (1) a c5-r block at $6.5K, (2) a Darton-sleeved LS1 block at $3K.
Is this correct?
..the only alternatives i know of are (1) a c5-r block at $6.5K, (2) a Darton-sleeved LS1 block at $3K.
Is this correct?
Re: average HP of 383 all bore??? I have a 4.125" on an LS6 block. No expensive Darton sleeves or a C5R block here. My car hasn't leaked a drop of coolant, if the shop knows what they're doing then you shoudn't have to worry. A 383 stroker I guess would be safer but wouldn't be as fun IMO because it would give you as much HP as a big bore will, and all that torque will be useless on the street anyway.
The 12.2:1 CR will work on a very conservative tune. I basically have a street tune and a race tune since I have LS1 edit at my disposal. I put down something like 450 rwhp and 450 rwtq with 91 octane and 11 degrees of timing. When I heard that I told AAP to put a more aggressive street tune on it and I'll use a mixture of 100 and 91 octane for the street and 103 for the track.
The 12.2:1 CR will work on a very conservative tune. I basically have a street tune and a race tune since I have LS1 edit at my disposal. I put down something like 450 rwhp and 450 rwtq with 91 octane and 11 degrees of timing. When I heard that I told AAP to put a more aggressive street tune on it and I'll use a mixture of 100 and 91 octane for the street and 103 for the track.
Thread Starter
TECH Veteran
iTrader: (6)
Joined: Feb 2002
Posts: 4,766
Likes: 0
From: Phoenix, AZ USA
Re: average HP of 383 all bore???
....and how do you plan on getting a 4.125 bore?
..the only alternatives i know of are (1) a c5-r block at $6.5K, (2) a Darton-sleeved LS1 block at $3K.
Is this correct?
..the only alternatives i know of are (1) a c5-r block at $6.5K, (2) a Darton-sleeved LS1 block at $3K.
Is this correct?
a) MTI has them for $1,995 + core charge (can get a block for less than $500)...
b) local machean shop (did my heads and builds top fuel engines) quoted me $1K for machean work/labor....so that plus $1,300 for the sleaves from TR is only $2,300....
Trending Topics
Thread Starter
TECH Veteran
iTrader: (6)
Joined: Feb 2002
Posts: 4,766
Likes: 0
From: Phoenix, AZ USA
Re: average HP of 383 all bore???
I have a 4.125" on an LS6 block. No expensive Darton sleeves or a C5R block here. My car hasn't leaked a drop of coolant, if the shop knows what they're doing then you shoudn't have to worry. A 383 stroker I guess would be safer but wouldn't be as fun IMO because it would give you as much HP as a big bore will, and all that torque will be useless on the street anyway.
I'm not going stroker because it wouldn't do me any good:
1) I have 2.08/1.60 valves on my heads (pre-planned big bore) and they are shrouded in the stock bore. I need the larger bore so I can actually use the heads ($$$).
2) The 385RWTQ already burns the 295 I have on the rear in second (even lit the traction light going into 3rd at 75mph) so stroke/more torque would be BADDDDDDD for me.
3) People have subjected the factory crank to 800+ hp and had no problems, so my 600-650 hp should go for many years.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Re: average HP of 383 all bore??? I just have the MTI all-bore situation where they did up an LS6 block I sent them. I had the same issue; I have 2.08" valves and need the bore.
I used both a stock crank, and stock rods. Its a street car, and my end goal is to have a 427 in there. I didnt think it would be wise to buy 387 length rods only to buy different ones in a year or two. I believe that for my purposes, stock rods with ARP rod bolts is enough for an X1 cam (230/227) on a 114. I dont want to shift too far after 6000. Im going to enjoy the torque, but I have alot of traction, so Im barely able to get tip-in spin (shifting the tranny like a nutty bastard to get the rear to break loose doesnt count) in 2nd with the big nitto DRs. More torque would be fun.
With stock rods, the bottom end with cam, timing chain, oil pump, etc etc came to like 4800.
I'm very pleased that not only can I get it from MTI, who if they install it give oyu a warrantee, but also, I can get it for a great price.
Chris
I used both a stock crank, and stock rods. Its a street car, and my end goal is to have a 427 in there. I didnt think it would be wise to buy 387 length rods only to buy different ones in a year or two. I believe that for my purposes, stock rods with ARP rod bolts is enough for an X1 cam (230/227) on a 114. I dont want to shift too far after 6000. Im going to enjoy the torque, but I have alot of traction, so Im barely able to get tip-in spin (shifting the tranny like a nutty bastard to get the rear to break loose doesnt count) in 2nd with the big nitto DRs. More torque would be fun.
With stock rods, the bottom end with cam, timing chain, oil pump, etc etc came to like 4800.
I'm very pleased that not only can I get it from MTI, who if they install it give oyu a warrantee, but also, I can get it for a great price.
Chris
Re: average HP of 383 all bore??? Yeah, AAP uses a dry L.A. sleeve setup, much cheaper than the Darton Blocks and I've put lots of street miles on it with no problems whatsoever. Visceral, you'll like the torque but if you think that anything less than ET Streets at around 15 psi will hold that kind of power your in for a surprise 
. I have Yokohama 315 Road Races tires in the rear, boxed LCA's, RT torque arm at a -2 pinion angle, and a heavy woofer box in my truck right over the rear wheels. That's as much traction with street tires that you can get and I still have gotten a little sideways in 2nd from a roll. Of course the 4.33's don't help much either 
. I have Yokohama 315 Road Races tires in the rear, boxed LCA's, RT torque arm at a -2 pinion angle, and a heavy woofer box in my truck right over the rear wheels. That's as much traction with street tires that you can get and I still have gotten a little sideways in 2nd from a roll. Of course the 4.33's don't help much either 
Re: average HP of 383 all bore??? $2300 
Don't forget you need pistons and other items when you into this type of project.
$4,250 from JPR:
Our All Bore 382 Short Blocks are aluminum blocks that are machined to accommodate larger bore sizes. The All Bore 382's come standard with forged pistons (tailored to your application), Kwiss heavy duty timing sets , ARE ported high volume oil pump, ARP rod bolts and main studs and all bearings are Federal Mogul. Up-graded billet mains, rods and studs are available at an additional cost.
Don't forget you need pistons and other items when you into this type of project.
$4,250 from JPR:
Our All Bore 382 Short Blocks are aluminum blocks that are machined to accommodate larger bore sizes. The All Bore 382's come standard with forged pistons (tailored to your application), Kwiss heavy duty timing sets , ARE ported high volume oil pump, ARP rod bolts and main studs and all bearings are Federal Mogul. Up-graded billet mains, rods and studs are available at an additional cost.
TECH Veteran
Joined: Aug 2002
Posts: 4,055
Likes: 1
From: Hartsdale, NY
Re: average HP of 383 all bore??? OK great.
Why do I read so many posts about people dropping sleeves in non-Darton sleeved blocks?
Are these casulties the result of earlier pre-production resleeving processes that were not very good; has the resleeving process been recently perfected?
Thanks...
Why do I read so many posts about people dropping sleeves in non-Darton sleeved blocks?
Are these casulties the result of earlier pre-production resleeving processes that were not very good; has the resleeving process been recently perfected?
Thanks...
TECH Veteran
Joined: Aug 2002
Posts: 4,055
Likes: 1
From: Hartsdale, NY
Re: average HP of 383 all bore??? Where can you buy blocks for $500? ...I saw a Lingenfelter web page with the Darton block for $2,500 plus core....
If you did not have a core, the web page says add $500 for a block.
Is $500 the current market price for a used LS1 block?
Does Darton also offer the re-sleeving service or do they only sell the Darton sleeves to others?
If you did not have a core, the web page says add $500 for a block.
Is $500 the current market price for a used LS1 block?
Does Darton also offer the re-sleeving service or do they only sell the Darton sleeves to others?
Re: average HP of 383 all bore???
I have a 4.125" on an LS6 block. No expensive Darton sleeves or a C5R block here. My car hasn't leaked a drop of coolant, if the shop knows what they're doing then you shoudn't have to worry.
Re: average HP of 383 all bore???
I have a 4.125" on an LS6 block. No expensive Darton sleeves or a C5R block here. My car hasn't leaked a drop of coolant, if the shop knows what they're doing then you shoudn't have to worry.
Re: average HP of 383 all bore??? JE said the pistons will take anything under a 200 shot, so after I get some motor times I'll swap the 4.33's for 4.11's and try a progressive controlled 150-175 wet shot 
Thread Starter
TECH Veteran
iTrader: (6)
Joined: Feb 2002
Posts: 4,766
Likes: 0
From: Phoenix, AZ USA
Re: average HP of 383 all bore???
$2300
Don't forget you need pistons and other items when you into this type of project.
$4,250 from JPR:
Don't forget you need pistons and other items when you into this type of project.
$4,250 from JPR:
that $4250 is a complete short block (even has an oil pump)...
I'm going to use all the stuff off of my current engine (oil pump, crank, rods, double roller chain, head studs, etc). It won't cost me much to have the crank and rods cleaned up (less than $500). Pistons/rings seem to be the only other "big" cost that I would have and they are $500-$700 depending on what I go with. Sure there will be things like gaskets, bearings, and ARP bolts/studs but it should still be less than the $4250 JPR wants (since I'm reusing things).
Fianlly, I'm assembling the engine myself (won't charge myself too much $$$ there
).an unseen cost that I had not thought about was a cam.....I'm going to need something much larger than the TR224 I have...