Don Terrill’s Speed-Talk

They were not 'recently' discontinued. That happened a lonnng time ago. That part number as you know is for Bowtie Vortec heads in a large port, which is 225cc intake port volume. There are zero new castings anywhere, I know, as I bought the last one available in Pennsylvania 2 years ago, just one h...

StarHg wrote: ↑Fri Sep 29, 2023 9:05 pm It would be the preferred location on a dry sump system.

Why would that be?
Would it not be a valve cover or 'T' into the valley scavenge on a 6 stage setup?

Looking to see whats the latest everyone is using on race engines. All of my stuff is old and in need of replacing mostly, and so wanting to re-stock the shelves so to speak with all new stuff. This is for drag race engines, naturally aspirated, whats everyone having success with and using, please l...

306 stainless of course, roughly $ cost?

^^^ What F-Bird said. If your looking for '034' Phase 2/3 iron heads, ther's some on Facebook marketplace now: https://www.facebook.com/marketplace/item/776880046977136/?hoisted=false&ref=search&referral_code=null&referral_story_type=post&tracking=browse_serp%3Ada902330-73a2-45c1-87f...

If you have the large port Bowtie Vortec iron heads professionally ported by someone who knows how to do them, 650 to 700+ is attainable even on small 310 cube small blocks. 062 Vortec 'street' heads, no. When you get the welder out almost anything is possible...... vortecpro, no welding to do that...

<r><QUOTE author="winterhoff" post_id="886365" time="1611939062" user_id="3781"><s>[quote=winterhoff post_id=886365 time=1611939062 user_id=3781]</s> Could someone help me ? what would you think a new set of GM new in box 25534445 large vortec heads be worth Thanks Ron <e>[/quote]</e></QUOTE> Do you...

I just sold my Large Port Vortec heads a couple of weeks ago. While I did get them into the 285cfm range I decided to get some aluminum heads to pull some weight off the front end of the car and it also might make it possible to run higher compression with pump gas. Damn. I am looking for a second ...

If you have the large port Bowtie Vortec iron heads professionally ported by someone who knows how to do them, 650 to 700+ is attainable even on small 310 cube small blocks.
062 Vortec 'street' heads, no.

Did not try a Holley/Dorton ported, ran out of time to procure one and get it ported by a pro, but, we tried four manifolds on a comp SB high RPM deal, a few years ago, on a known accurate dyno. An Edelbrock Super Victor ported by Hogans, the GM bowtie ported by Hogans, AFR TFX composite and a fully...

"and the right Cam with the right placement of the overlap to get into the 155% VE range"

155% VE ??

and would another benefit of babbit vs roller be that a given cam core id, for instance on say a SB chev take a 55mm roller cam bearing, but a 60mm babbit bearing, so the benefit is a larger cam core = stiffer cam with all of the benefits of same?

I always believed that straight lines, round holes, surface finish and proper clearance will carry the day. Coatings get bonus points. If I build an engine to use 20w50 oil that is what I use to assemble, prime and run down the track. Never, ever an issue. I can see the wisdom in a break in and pos...

have 2 different SBC projects to do, and various blocks we can use. Can you help with that list
or ?

Can someone critique/check the following for Chevy cam bore sizes, it should list both standard and bigger available, I know its not correct as someone gave it to me, so: