388 stroker anyone?
I am building a 388 stroker. Its pretty much together. I had quite a few clearance problems and because its a 1 piece main seal 89 block the balancing was a *%#th.
Anyone know what kind of power I might be making its going in a 68 chevelle.
89 350 Roller
Eagle 3.75 crank
.060 Hyp pistons Fed Mugal (sp)
Cam 230/230 .56x/109 LSA
Victor Jr Intake w/2" spacer
GM ignition box the heavy duty one "Blue"
soft touch rev limiter
MSD adjustable spark timing control
Mallory dual point distributor
Holley 750 double pumper carb
Stock heads with minor port work 2.02 valves nothing too special.
Double Roller timing chain
LT headers / flowmaster mufflers new that were on the car when I got it.
3.73 gears/ 12 bolt.
Also any tips or bolt ons you can think of to make it faster
Also does anyone have a clue what a 68 chevelle weighs? I cant find that info anywhere.
I am not an old school engine person. This is the most involved I have been in one. I am pretty straight with my LS1 thanks to forums like this one so please excuse if I get things a little mixed up. I am more excited about this project than the SS!
I am really excited I hope it can beat my 2000 SS. it has ~ 430rwhp. from a lot of work and one monster cam. I hope it will dip into the 11s at least if it cant get 11.5s.
Any input would be appreciated. I see a lot of dyno and times from a 383 but what about the 388?
There is really no difference in the 383 and 388 you can expect a minute amount more power with all other things equal.
You have some pretty high goals set for that 68 Chevelle, it is not a light car. If you want to find out more info on Chevelles I highly suggest you check out www.chevelles.com Very good group of guys over there. You should also be able to find a few with a similar setup to get an idea of what you can expect to run.
You didn't say what type of transmission or stall speed so that makes it hard to predict.
If you can hook I think mid 12's should be possible. I don't know about mid 11's. Do you run slicks? If so maybe low 12's on motor.
5 cubes won't make much difference, sometimes the motor will make less HP because of the thinner cylinder walls.
a 383 .060 over would be a 394 BTW.
DD2k say it should put out 413HP AT 5000RPM and 483Ft. lbs of torque at 3500RPM, at the crank
But since you did'nt mention the compression, exhaust valve size, intake detail, or more detailed cam specs, I cant get any more accurate, I used 9.5:1.
And adding 11 more cubes(from 383) gives it 2 more HP and and 16 more ft. lbs.
It is a 350 bored .060 over with a 3.75" crank this is a 388ci not a 394. :nono:
The horsepower difference will be minute if any.
ah failed to notice that, only difference is .030 in though.
True the difference is only .030 but, you can't bore a 350 .090" over and if you do don't expect it last long if at all.
394 would be 4.090" bore using a 3.75" crank in a 350 block.
Thanks for the replies. Yes those are high goals I did quite a bit of research and now I understand it most likely wont have the power of my ls1. I figured it must weigh less and that would make up for some of the power loss. I figured that car must weigh around 2900lbs but I see its quite a bit more more like 3500 - 3700.
3500-3700lbs even seems a little light to me for a 69 Chevelle, unless it has been on a diet (fiberglass, etc..). A Camaro weighs in the 3500-3700lb range in stock form (talking 1st and 2nd gens). Don't give up hope it will still be a fun car and there is always nitrous, LOL.
The new LS1's are hard to beat they have a different valve angle and are very efficient, can make big power. Though the 388 will feel a lot different, will make lots of torque.
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