We are currently running on the new domain and server: www.Speed-Talk.com

IMPORTANT: Update your bookmarks to https://www.speed-talk.com/forum/
(Right-click the URL and select "Bookmark this link")

Search found 4499 matches

by Carnut1
Sun Nov 10, 2019 7:59 am
Forum: Engine Tech
Topic: Bench Data
Replies: 137
Views: 9861

Re: Bench Data

Sounds sweet, that will be plenty of fun on the street!
by Carnut1
Sun Oct 20, 2019 8:54 pm
Forum: Engine Tech
Topic: Ford's atomiser plate - how does it work?
Replies: 15
Views: 965

Re: Ford's atomiser plate - how does it work?

The atomizer looks to me more like a gutter. A flat gutter, designed to collect liquid fuel and drip the fuel outside the center ports to the plenum. I don't think it is a great design but I am sure afr is not very even without it in that intake. At least until it warms up.
by Carnut1
Sun Oct 20, 2019 3:27 pm
Forum: Engine Tech
Topic: 305 head flow possibilities?
Replies: 52
Views: 2634

Re: 305 head flow possibilities?

gmrocket wrote:
Sun Oct 20, 2019 2:47 pm
Bill Chase wrote:
Sun Oct 20, 2019 7:40 am
113 corvette castings are cheap. Easier to port.
What's that?
2nd design aluminum Corvette head. 1.94"/ 1.5". With 2.0" / 1.55" valves and some porting they go about 260/185 cfm.
by Carnut1
Sun Oct 20, 2019 11:29 am
Forum: Engine Tech
Topic: Cam selection for budget 351w...splitting hairs
Replies: 6
Views: 471

Re: Cam selection for budget 351w...splitting hairs

I would like to see the heads get some porting and a similar grind to Comp 252 on a 108 lc.
by Carnut1
Wed Oct 16, 2019 6:35 am
Forum: Engine Tech
Topic: 14014415 and/or stroked 267
Replies: 38
Views: 1032

Re: 14014415 and/or stroked 267

I only built one and it was a long time ago. Chambers are very small but I don't remember the cc. I upgraded to a 1.5 exhaust valve I don't remember why. Heads and intake got ported. Similar cam and just a rebuild. With lt1 style 1.25" valve springs it had no issue with 6500 rpm. Even with the tiny ...
by Carnut1
Tue Oct 15, 2019 10:51 am
Forum: Engine Tech
Topic: Re-drilling 72 degree angle sbc heads.
Replies: 14
Views: 800

Re: Re-drilling 72 degree angle sbc heads.

I believe the 217 is about the same as 083 casting. They cam be made to work with some porting. Very good street performance head.
by Carnut1
Mon Oct 14, 2019 6:52 pm
Forum: Engine Tech
Topic: L48 Project: Ported Chevy 450 heads vs. Bowtie vortec heads
Replies: 161
Views: 13831

Re: L48 Project: Ported Chevy 450 heads vs. Bowtie vortec heads

ok,, you asked for a comparison to see how you did. its not good. from 2500 thru 5700 you were down about 161 points compared to the olds if scored by EMC. the olds heads flowed 220/160. these same heads on an 11.4 :1 set up made 504/454 Ford 306 9 to 1 comp, thick head gaskets, 204, 204, .472, .47...
by Carnut1
Mon Oct 14, 2019 4:15 pm
Forum: Engine Tech
Topic: L48 Project: Ported Chevy 450 heads vs. Bowtie vortec heads
Replies: 161
Views: 13831

Re: L48 Project: Ported Chevy 450 heads vs. Bowtie vortec heads

ok,, you asked for a comparison to see how you did. its not good. from 2500 thru 5700 you were down about 161 points compared to the olds if scored by EMC. the olds heads flowed 220/160. these same heads on an 11.4 :1 set up made 504/454 Ford 306 9 to 1 comp, thick head gaskets, 204, 204, .472, .47...
by Carnut1
Mon Oct 14, 2019 6:54 am
Forum: Engine Tech
Topic: 706 LS heads - how'd I do?
Replies: 16
Views: 1440

Re: 706 LS heads - how'd I do?

Resized_20190814_183752_9329.jpeg LS cathedral ports are an interesting design. Seems to me most guys just make them big and they flow well. I am working on a cathedral port aftermarket head and Holley manifold combo. 2.02" 1.6" 220cc runner and a little over 300 cfm @ .7" through the carb all bolt...
by Carnut1
Sun Oct 13, 2019 7:31 pm
Forum: Engine Tech
Topic: Intake manifold CSA
Replies: 23
Views: 2033

Re: Intake manifold CSA

Resized952018102895191809954382 (1).jpg
Did you use a radius or bellmouth inside the plenum?
by Carnut1
Sun Oct 13, 2019 5:18 am
Forum: Engine Tech
Topic: 305 head flow possibilities?
Replies: 52
Views: 2634

Re: 305 head flow possibilities?

https://www.google.com/url?sa=t&source= ... N0GmLIsIlk
An older thread I did on 450 castings.
by Carnut1
Sun Oct 13, 2019 5:16 am
Forum: Engine Tech
Topic: 305 head flow possibilities?
Replies: 52
Views: 2634

Re: 305 head flow possibilities?

The ports are the same for 1.72" and 1.84" valve heads. Be sure these castings are not cracked! They are thin walled castings but can flow fairly well if ported.
by Carnut1
Sat Oct 12, 2019 4:14 pm
Forum: Engine Tech
Topic: rocker stud breaking
Replies: 14
Views: 1021

Re: rocker stud breaking

Belgian1979 wrote:
Sat Oct 12, 2019 3:36 pm
That was my first guess, so I told him to keep the rpms within reason...
The problem with spring surge or float is it overheats the springs very fast. Once they heat they lose load and then surge or float even easier. Testing those springs is probably a good idea. Thanks, Charlie
by Carnut1
Sat Oct 12, 2019 3:18 pm
Forum: Engine Tech
Topic: rocker stud breaking
Replies: 14
Views: 1021

Re: rocker stud breaking

Early 90's I did not know what a redline was so I broke plenty of studs before I realized I was asking too much from the valve springs and was going into surge and at times float. When the spring finally catches up the forces go through the roof.
by Carnut1
Thu Oct 10, 2019 12:31 pm
Forum: Engine Tech
Topic: EMC 289
Replies: 65
Views: 3390

Re: EMC 289

Those two sets of 289 heads are still at Terry Walters shop awaiting DV to dyno test them. Obviously not at the top of his to do list. You could/should test them yourself///that way you know////a 289 or 302 shortblock could be done for a reasonable amount I would think/////you could probably tool o...