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Search found 29 matches

by Jim2527
Wed Aug 03, 2022 12:01 pm
Forum: Engine Tech
Topic: Longevity of flat plane crank engine?
Replies: 19
Views: 813

Longevity of flat plane crank engine?

Someone brought this up over at the corvette place. What are you opinions on the longevity of a flat plane crank engine as a daily driver and if tracked?

Thanks -Jim
by Jim2527
Thu Oct 21, 2021 10:08 am
Forum: Engine Tech
Topic: New Z06 engine guesstimates?
Replies: 5
Views: 941

New Z06 engine guesstimates?

What do you think the new Z06 engine will make based on the following:

5.5L 335cid
Flat plane crank
DOHC
Normaly aspirated
8,500 redline
Smooth idle of 750?
3yr/36k warranty
by Jim2527
Mon Jun 14, 2021 3:29 pm
Forum: General Tech
Topic: rpm-act
Replies: 50
Views: 6070

Re: rpm-act

Someone sold the device bubba used to diesel fog the lady riding her bike. Saw this first hand....
the grey area in your argument is when freedom of expression transcends into freedom of action.
by Jim2527
Sun Jun 06, 2021 2:06 pm
Forum: Engine Tech
Topic: Indy car engine difference…
Replies: 37
Views: 3098

Re: Indy car engine difference…

https://www.popularmechanics.com/cars/c ... cing-tire/

That article doesn’t list changes year to year... current rears are 415’s or 16”
by Jim2527
Fri Jun 04, 2021 1:16 pm
Forum: Engine Tech
Topic: Indy car engine difference…
Replies: 37
Views: 3098

Indy car engine difference…

Current engines. Chevy is a collaboration with Ilmor Honda say ‘built’ by HPD in California Are these the same engines but rebadged? Are there any common parts like blocks, heads etc and then each manufacturer builds/assembles tunes? I tried googling for pics to compare things like valve cover bolt ...
by Jim2527
Fri Apr 23, 2021 5:29 pm
Forum: Engine Tech
Topic: Would you buy a Holley 4175 converted from 4160 to 4150?
Replies: 1
Views: 259

Would you buy a Holley 4175 converted from 4160 to 4150?

As the title states... I've been looking for a 4175 (spreadbore VS electric choke) and have been offered one that was converted to 4150 style with the rear metering block. Its for a relatively basic 350/350 SBC. Stay away or go for it? $350... I have no desire in changing the manifold to a square bo...
by Jim2527
Thu Oct 08, 2020 1:44 pm
Forum: Engine Tech
Topic: Anything inherently wrong with this BBC combo?
Replies: 8
Views: 709

Re: Anything inherently wrong with this BBC combo?

If the flat tops are replaced with a 20cc dome with this kit >>> https://www.skipwhiteperformance.com/catalog/bbc-chevy-496-assembly-scat-wiseco-20cc-dome-4280-pistons-030-over-2pc-rms_92553/ and the 781's are milled to a 117cc chamber, what do you guy think now? Truck is driven almost daily weather...
by Jim2527
Thu Oct 08, 2020 11:16 am
Forum: Engine Tech
Topic: Anything inherently wrong with this BBC combo?
Replies: 8
Views: 709

Anything inherently wrong with this BBC combo?

492? .030 over. Flat top pistons, Comp K kit K11-413-8, Edelbrock dual plane intake, Holley carb, long tube headers. Stock 781 heads with stainless undercut valves. nothing exotic.... '82 chevy pickup, Muncie SM465 with the low 6.55 first gear. XR264-HR cam Advertised Intake Duration:264 Advertised ...
by Jim2527
Wed Jul 10, 2019 6:40 pm
Forum: Engine Tech
Topic: Pro Stock What If - Carb/EFI
Replies: 65
Views: 4996

Re: Pro Stock What If - Carb/EFI

You need to follow WEC/ALMS/LeMans for any innovation and that’s where the factories are really trying some cool stuff. MotoGP and F1 are still pretty loose as well and the factories are doing cool stuff there. For top level, most open rules, naturally aspirated, then MotoGP is your ticket. They’re...
by Jim2527
Fri Mar 15, 2019 5:35 pm
Forum: Engine Tech
Topic: Ported Chevy 083 heads, the tpi project
Replies: 330
Views: 29782

Re: Ported Chevy 083 heads, the tpi project

Carnut1 wrote: Fri Mar 15, 2019 11:40 am

Question for non pro airflow guys, Why the large cut on the inside radius of a turn?
Changes pressure. Pressure changes = flow/velocity change. That cut will allow you to control location of the flow downstream.
by Jim2527
Mon Mar 11, 2019 5:16 pm
Forum: Engine Tech
Topic: Real Budget Vortec Engine build
Replies: 159
Views: 19799

Re: Real Budget Vortec Engine build

CGT wrote: Mon Mar 11, 2019 3:18 pm Thanks Jim. That may give some people an ideal of what the format looks like. It's really well done. I learned a lot already from viewing it? Did you play with the drop downs etc?
Drop downs are really cool. I saved the file then opened it with Works. The online version of excell works well.
by Jim2527
Mon Mar 11, 2019 3:08 pm
Forum: Engine Tech
Topic: Real Budget Vortec Engine build
Replies: 159
Views: 19799

Re: Real Budget Vortec Engine build

Image
by Jim2527
Tue Feb 12, 2019 4:22 pm
Forum: Engine Tech
Topic: Spears Racing Heads
Replies: 29
Views: 4215

Re: Spears Racing Heads

You will find him over at YB. Thanks.,' It seems a little too brutal for me. But I do enjoy his posts and jokes..... Like the way he is "out" a lot of times...but not really///keeps you in suspense. Like mentioned previously a man of conviction. Eh. Just ignore the YB tone. That's what I do.
by Jim2527
Mon Dec 10, 2018 2:29 pm
Forum: Engine Tech
Topic: Header Theory by Vince Roman from Burns @ PRI
Replies: 83
Views: 11751

Re: Header Theory by Vince Roman from Burns @ PRI

This is a pic I lifted from another site. Its a 180 degree C6 Corvette piece. IIRC the owner/welder strived for equal length tubes. Seems like the owner/welder should've sacrificed equal length for smoother bends?

Image
by Jim2527
Thu Dec 06, 2018 8:37 am
Forum: Engine Tech
Topic: Header Theory by Vince Roman from Burns @ PRI
Replies: 83
Views: 11751

Re: Header Theory by Vince Roman from Burns @ PRI

Calvin, you've mentioned a preference for 4-2-1 headers below a certain rpm. Are your 4-2-1 headers the same as 'tri Y'? Can you talk about the differences between a Tri-Y and 4-2-1 systems? I understand not wanting 90 degree firing cylinders going into the same 'Y'.