pros and cons of a 383 tpi
Thread Starter
Junior Member
Joined: Jan 2008
Posts: 99
Likes: 0
From: palmdale,CA
Car: 1991 camaro z28
Engine: 5.7 TPI L98
Transmission: 700r4
Axle/Gears: stock
pros and cons of a 383 tpi
basically what the title says also how difficult would it be to put in a 383 kit yourself with a pretty good knowledge of the car a a fairly good tool set thinking of doing it over the winter but no sure yet thanks for any help
Supreme Member
Joined: Jan 2003
Posts: 2,133
Likes: 4
From: Houston, Texas
Car: 88' IROCZ
Engine: 388 TPI Motown 350 Race block
Transmission: 700R4
Axle/Gears: 2.77
Re: pros and cons of a 383 tpi
Mechanically there's no difference in building a 350, or 383.
You relly need to decide on what you want; daily driver, street/strip, Race only...etc. Mine is for daily driving, and mild street as such it had to have all green stuff working.
Buy the parts take them & block to a shop to do the machining & prepping then put it together yourself. Ask about issues like clearance issues from using a longer stroke.
Use a performance shop, but don't let them dictate on what combination to use. Ask for advice, but remember that's all it is advice you don't have to agrre with it. Have a cam company recommend a cam based on what you decided on the use of the car will be.
And we are here to help. Happy wrenching!
You relly need to decide on what you want; daily driver, street/strip, Race only...etc. Mine is for daily driving, and mild street as such it had to have all green stuff working.
Buy the parts take them & block to a shop to do the machining & prepping then put it together yourself. Ask about issues like clearance issues from using a longer stroke.
Use a performance shop, but don't let them dictate on what combination to use. Ask for advice, but remember that's all it is advice you don't have to agrre with it. Have a cam company recommend a cam based on what you decided on the use of the car will be.
And we are here to help. Happy wrenching!
Thread Starter
Junior Member
Joined: Jan 2008
Posts: 99
Likes: 0
From: palmdale,CA
Car: 1991 camaro z28
Engine: 5.7 TPI L98
Transmission: 700r4
Axle/Gears: stock
Re: pros and cons of a 383 tpi
looking to build a daily driver that i can also race on weekends at the track
and how much does a machine shop usally cost
and also which kit is the best qualtiy and doesnt have to be the cheapest
and how much does a machine shop usally cost
and also which kit is the best qualtiy and doesnt have to be the cheapest
Joined: Feb 2002
Posts: 3,462
Likes: 4
From: N. Illinois
Car: 92 GTA/ 00 TA
Engine: 383/350
Transmission: 700R4/T-56
Re: pros and cons of a 383 tpi
Every time I asked how much to my machinist he said "figure everything starts at $100".
Figure all machining between 300 and 800 bucks. Depends on what you have done.
I like my Eagle crank and rods with SRP slugs. $1800 for the forged kit.
Figure all machining between 300 and 800 bucks. Depends on what you have done.
I like my Eagle crank and rods with SRP slugs. $1800 for the forged kit.
Senior Member
iTrader: (7)
Joined: Dec 2007
Posts: 618
Likes: 0
From: Williamstown, NJ
Car: '98 Mustang GT
Engine: '03 4.6L
Transmission: T45
Axle/Gears: DK
Re: pros and cons of a 383 tpi
Just remember that the estimate they give you is an estimate. Everytime I've had work done it came to $100-$200 more than originally thought.
Senior Member
Joined: Jul 2006
Posts: 811
Likes: 2
From: 4-22 / 7-25
Car: '91 Z28 L98 G92
Engine: Modded L98
Transmission: Modded 700R4
Axle/Gears: Modded 10-Bolt
Re: pros and cons of a 383 tpi
Supreme Member
Joined: Jan 2003
Posts: 2,133
Likes: 4
From: Houston, Texas
Car: 88' IROCZ
Engine: 388 TPI Motown 350 Race block
Transmission: 700R4
Axle/Gears: 2.77
Re: pros and cons of a 383 tpi
by the time your done a crate motor would be less even with quality parts, but if getting your hands greasy is what makes you happy go for it, I did.
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Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Re: pros and cons of a 383 tpi
Save yourself the extra cost and build a 350. See my posts in the TPI board on "Our quest for a better flowing TPI" and "Visual TPI intake ports" to see the reason why a long runner TPI doesnt work with a 383. Those posts will also tell you what you have to do to a TPI intake to make it work above 4500 rpms.
And when you're done with your engine, call me up and I'll do the custom chip for you.
R & E Racing is a good place, I usually talk to John when he buys parts from me at Manley.
Senior Member
Joined: Oct 2002
Posts: 980
Likes: 0
From: Santa Ana CA
Car: 1991 GTA
Engine: 350 tPI
Transmission: 700r4
Axle/Gears: 342
Re: pros and cons of a 383 tpi
I think, decide what kinds of cars you want to beat. A stock car is fine for racing at the track. Do your bracket well. 
If you want to beat a completly stock LS1, you can easily with 350 mods, but look very carefully at what others have done before.
A 383 may resemble stock, but what you might need to feed it may not pass CA smog. (I don't think a 700r4 could handle it, either.) There are 3rd gens in CA faster than 11 sec, but maybe not smog legal.
The more torque and Hp you make, the less "daily" it is, you have to make sacrifices in one place or another, esp. handling.
I don't care how easy it sounds. This is why exotic cars cost so much. But if you like it, its worth it.
It is easier to adjust to small changes in your cars mods, a race car can be a beast. /\
PS definitly go for forged internals. Don't forget suspension mods and body.

If you want to beat a completly stock LS1, you can easily with 350 mods, but look very carefully at what others have done before.
A 383 may resemble stock, but what you might need to feed it may not pass CA smog. (I don't think a 700r4 could handle it, either.) There are 3rd gens in CA faster than 11 sec, but maybe not smog legal.
The more torque and Hp you make, the less "daily" it is, you have to make sacrifices in one place or another, esp. handling.
I don't care how easy it sounds. This is why exotic cars cost so much. But if you like it, its worth it.
It is easier to adjust to small changes in your cars mods, a race car can be a beast. /\

PS definitly go for forged internals. Don't forget suspension mods and body.
Last edited by JulieGTA; Dec 27, 2008 at 04:44 AM.
Senior Member
Joined: Sep 2007
Posts: 1,091
Likes: 1
From: West Central Ohio
Car: 86 vette
Engine: 383
Transmission: 700R4
Axle/Gears: 3.07
Re: pros and cons of a 383 tpi
I like my 383 Daily Driver, Rain snow ice what ever. If the car limits the torque, fix the car or get a different platform.
Drive a Hot rod on real slick roads and gain real appreciation of all that power.
Not all stock 383 TPI burn the tires off. Some just leave, read about Grumpy talking about tuning, torque, and launches.
If you want to run a "stock TPI" 383, it makes a nice street setup. My motor started out as a short block, the machine shop keeps one around for the circle track guys, all forged internals and flat top pistons. I then told the guy what I was going to do with it. He built up the rest of the engine to match the cars normal rpm range (1000-5000). He is an old carb man and didn't under stand anything computer as to cars. He knows his engines, it idles smooth and makes power where needed. Roller cam and rockers, aluminum heads.
And ask Dana at Probuilt Automatics about 383's and 700R4's, he doesn't have any problem building something that really works.
Speed is money "How fast/quick do you want to go?"
Drive a Hot rod on real slick roads and gain real appreciation of all that power.
Not all stock 383 TPI burn the tires off. Some just leave, read about Grumpy talking about tuning, torque, and launches.
If you want to run a "stock TPI" 383, it makes a nice street setup. My motor started out as a short block, the machine shop keeps one around for the circle track guys, all forged internals and flat top pistons. I then told the guy what I was going to do with it. He built up the rest of the engine to match the cars normal rpm range (1000-5000). He is an old carb man and didn't under stand anything computer as to cars. He knows his engines, it idles smooth and makes power where needed. Roller cam and rockers, aluminum heads.
And ask Dana at Probuilt Automatics about 383's and 700R4's, he doesn't have any problem building something that really works.
Speed is money "How fast/quick do you want to go?"
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