Inexpensive 350 Build
Moderator: Team
Inexpensive 350 Build
My son built this inexpensive 350 and I thought it might be of interest seeing it will be run in the car at the track soon. Here's what he built, he started off with 1 piece 350 roller block 638 casting, used 4 valve relief hyperutectic flat top pistons, stock GM O rods, factory 3.480 stroke crank with a Comp hyd roller cam .502 lift 224/230/110. L98 heads were used with a 2.003 intake valve and 1.50 exhaust, the intake is a Performer RPM air gap. Factory GM 4 quart pan. The track test should be interesting! Some pictures
You do not have the required permissions to view the files attached to this post.
Racing a NA NHRA stocker should be mandatory before any posting.
Re: Inexpensive 350 Build
Sounds very interesting. There’s nothing better than a drag test. To bad they’re not as popular to share as engine dyno testing.
Can you tell us a little bit about the test car ? And where you race ?
Can you tell us a little bit about the test car ? And where you race ?
-
- Expert
- Posts: 674
- Joined: Sun Aug 10, 2008 11:51 am
- Location:
Re: Inexpensive 350 Build
What is better is a dyno/drag test, and we have both here, not fancy parts here, but data to share no matter the results.
Racing a NA NHRA stocker should be mandatory before any posting.
Re: Inexpensive 350 Build
5/64/5/64/3/16 Moly Sealed power rings. Think cheap......................turbo camino wrote: ↑Fri Feb 16, 2024 8:49 am What ring package - 1.5/1.5/3, like the later L31 used?
Last edited by vortecpro on Fri Feb 16, 2024 9:13 am, edited 1 time in total.
Racing a NA NHRA stocker should be mandatory before any posting.
Re: Inexpensive 350 Build
The car is a mid 80s Camaro raced @ 475 feet elevation, dyno tested @ 900 feet elevation. The car has a T350 with 4.56 gears, 9 inch slick, around 3200 pounds race ready. All testing will be done @ Xtreme Raceway. More pictures
You do not have the required permissions to view the files attached to this post.
Racing a NA NHRA stocker should be mandatory before any posting.
-
- Expert
- Posts: 674
- Joined: Sun Aug 10, 2008 11:51 am
- Location:
Re: Inexpensive 350 Build
Silvolite makes one with metric ring pack as well, similar price. I used a set recently. Plus they are 1.560 Comp height.turbo camino wrote: ↑Fri Feb 16, 2024 9:55 am $350 bux?
https://www.summitracing.com/parts/slp-h815dcp30
https://www.summitracing.com/parts/slp-e-921k30
-
- HotPass
- Posts: 176
- Joined: Sat Jan 26, 2019 7:22 am
- Location: Redmond, Oregon
Re: Inexpensive 350 Build
Vortec pro:
Mahla 224-3497
Quality Piston with desirable ring pack to be had for less than $300 w/Rings.
Mahla 224-3497
Quality Piston with desirable ring pack to be had for less than $300 w/Rings.
Re: Inexpensive 350 Build
That would be the way to go if they made them in oversizes. ThanksJusta1time wrote: ↑Fri Feb 16, 2024 10:56 pm Vortec pro:
Mahla 224-3497
Quality Piston with desirable ring pack to be had for less than $300 w/Rings.
Racing a NA NHRA stocker should be mandatory before any posting.
-
- Expert
- Posts: 674
- Joined: Sun Aug 10, 2008 11:51 am
- Location:
Re: Inexpensive 350 Build
224-3497.030
But I don't see the point in that, since the 2mm top ring is .0787" (metric version of 5/64")..
But I don't see the point in that, since the 2mm top ring is .0787" (metric version of 5/64")..
DON'T PANIC
Re: Inexpensive 350 Build
The Mahle piston is lighter than the H345 piston we used. We did take 17 grams out of the O rods, we also did some work to the crank.turbo camino wrote: ↑Sat Feb 17, 2024 4:09 am 224-3497.030
But I don't see the point in that, since the 2mm top ring is .0787" (metric version of 5/64")..
You do not have the required permissions to view the files attached to this post.
Racing a NA NHRA stocker should be mandatory before any posting.
Re: Inexpensive 350 Build
Very similar to my 1st roller cammed 350 (same XR276HR). Same pistons. Vortec heads rather than the L98's. Compression came in at 10:1 with the piston .030" down and a .026" gasket. The Vortecs had .006" taken off to true them up.vortecpro wrote: ↑Thu Feb 15, 2024 11:32 pm My son built this inexpensive 350 and I thought it might be of interest seeing it will be run in the car at the track soon. Here's what he built, he started off with 1 piece 350 roller block 638 casting, used 4 valve relief hyperutectic flat top pistons, stock GM O rods, factory 3.480 stroke crank with a Comp hyd roller cam .502 lift 224/230/110. L98 heads were used with a 2.003 intake valve and 1.50 exhaust, the intake is a Performer RPM air gap. Factory GM 4 quart pan. The track test should be interesting! Some pictures
Also in a mid 80's Camaro.
Dynojet said 280/282 HP/TQ. 700R4 in drive with an aftermarket 10" converter.
Best pass in full street trim other than ET Streets. 3.73 rear gear. 3600 lbs w/driver. August 2011:
630’, 73.4F°/23C°, 29.83” Hg/101.02 kPa, 65% rh
DA: 2046’
12.75 @ 105.93, 8.082 @ 83.39, 1.74 60’
12.449 @ 108.551 MPH corrected
I trust you'll be considerably quicker than that!
Watching with interest
Kevin
-
- HotPass
- Posts: 176
- Joined: Sat Jan 26, 2019 7:22 am
- Location: Redmond, Oregon
Re: Inexpensive 350 Build
Rings should be:vortecpro wrote: ↑Fri Feb 16, 2024 11:47 pmThat would be the way to go if they made them in oversizes. ThanksJusta1time wrote: ↑Fri Feb 16, 2024 10:56 pm Vortec pro:
Mahla 224-3497
Quality Piston with desirable ring pack to be had for less than $300 w/Rings.
https://www.summitracing.com/parts/mah-41616cp
These are made in oversizes. You just add .020, .030, .040 after the p/n. I bought my set from Autoplicity.
I literally have the same budget 350 concept as you and a few others. The irony of this is I tried to call you a year or so ago due to your name to talk with you about Vortec heads. You called back but I was already working at that time. Keep us updated on your project!
Last edited by Justa1time on Sat Feb 17, 2024 4:09 pm, edited 1 time in total.
-
- Expert
- Posts: 674
- Joined: Sun Aug 10, 2008 11:51 am
- Location:
Re: Inexpensive 350 Build
What is the advantage of a 2mm (.078") top ring over a 5/64" (.078") top ring?
The L31-type pistons are 1.5/1.5/3mm, same as the LS. Less friction, less heat, less wear, better sealing.
The L31-type pistons are 1.5/1.5/3mm, same as the LS. Less friction, less heat, less wear, better sealing.
DON'T PANIC