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 348 matches

by Calypso
Wed Jun 03, 2020 6:04 am
Forum: Engine Tech
Topic: Blasting media to restore as cast finish to alloy?
Replies: 6
Views: 154

Re: Blasting media to restore as cast finish to alloy?

Vapour blasting seems to give nice results. Several youtube videos about that and nice pictures from google search. A local guy built his own setup picking features from different videos and gets nice results. He uses glass "crush" as media mixed with water. Although not sure if it's a solution to e...
by Calypso
Sun May 31, 2020 5:01 pm
Forum: Engine Tech
Topic: Weird colored reversion.
Replies: 12
Views: 880

Re: Weird colored reversion.

PCV into the rear of the carb?
by Calypso
Tue May 12, 2020 12:38 am
Forum: Engine Tech
Topic: What SBF head is this? 289hipo/302/hi-port iron hybrid
Replies: 14
Views: 608

Re: What SBF head is this? 289hipo/302/hi-port iron hybrid

1972ho wrote:
Mon May 11, 2020 4:05 pm
Check the mustangtec sight you have a replacement 289/302 HIPO aftermarket head from ford 1970 casting date just like a replacement Cj holley carburetor that you could buy if you lost your original.
Those look like the same casting, but without the plugged thermactor holes.
by Calypso
Mon May 11, 2020 11:50 pm
Forum: Engine Tech
Topic: Piston oil squirters in NASCAR engines
Replies: 39
Views: 2830

Re: Piston oil squirters in NASCAR engines

IIRC, 351C stock rods also have a piston oil squirter channel in the big end cap parting line and a small notch in the rod bearing. By my understanding, those are for wrist pin and bore wall oiling, not for piston cooling. Piston cooling requires a different nozzle and flow volume. Not sure what th...
by Calypso
Mon May 11, 2020 12:36 pm
Forum: Engine Tech
Topic: What SBF head is this? 289hipo/302/hi-port iron hybrid
Replies: 14
Views: 608

Re: What SBF head is this? 289hipo/302/hi-port iron hybrid

Makes sense, but it did seem different enough to be cast differently. Can't claim expertise however.
by Calypso
Mon May 11, 2020 12:03 pm
Forum: Engine Tech
Topic: What SBF head is this? 289hipo/302/hi-port iron hybrid
Replies: 14
Views: 608

Re: What SBF head is this? 289hipo/302/hi-port iron hybrid

It's C8ZE
Google search on the crane Fireball head shows a same head. Didn't notice Crane stamping on these though. May have just missed it, or it wasn't there...
by Calypso
Mon May 11, 2020 11:59 am
Forum: Engine Tech
Topic: Lean spool for turbo freaks
Replies: 77
Views: 7768

Re: Lean spool for turbo freaks

Check valve (reed type) and activation solenoid worked without a pump in the 2-stroke. Something similar plumbed between intake and exhaust would be ridiculously simple and low maintenance. Potentially could help with surge too, while keeping the turbine spooling. That is, if that kind of setup woul...
by Calypso
Mon May 11, 2020 11:48 am
Forum: Engine Tech
Topic: What SBF head is this? 289hipo/302/hi-port iron hybrid
Replies: 14
Views: 608

Re: What SBF head is this? 289hipo/302/hi-port iron hybrid

The chamber and intake flange looks like 302 and the ex-port is clearly higher with nice short side, which seemed odd. Apparently these were an improved version.
by Calypso
Mon May 11, 2020 9:57 am
Forum: Engine Tech
Topic: What SBF head is this? 289hipo/302/hi-port iron hybrid
Replies: 14
Views: 608

Re: What SBF head is this? 289hipo/302/hi-port iron hybrid

1972ho wrote:
Mon May 11, 2020 9:49 am
Are you going to sell them.
No, they belong to a friend, just puzzled what they are. Didn't know C8 hipo heads existed...
by Calypso
Mon May 11, 2020 9:30 am
Forum: Engine Tech
Topic: What SBF head is this? 289hipo/302/hi-port iron hybrid
Replies: 14
Views: 608

What SBF head is this? 289hipo/302/hi-port iron hybrid

A curious pair of heads with Ford stampings. Valve sizes 1.89/1.6:

Image

Image

Image

Image

Image

Image
by Calypso
Mon May 11, 2020 5:33 am
Forum: Engine Tech
Topic: Piston oil squirters in NASCAR engines
Replies: 39
Views: 2830

Re: Piston oil squirters in NASCAR engines

IIRC, 351C stock rods also have a piston oil squirter channel in the big end cap parting line and a small notch in the rod bearing.
by Calypso
Mon May 11, 2020 5:28 am
Forum: Engine Tech
Topic: Lean spool for turbo freaks
Replies: 77
Views: 7768

Re: Lean spool for turbo freaks

Old thread, but interesting. Has anyone tried secondary air injection to speed up the spool? Koenigsegg has used pressurized air, which clearly works and is quite involved. I've successfully used air injection with check valve and solenoid increasing exhaust temperature to get a 2-stroke measurably ...
by Calypso
Sun May 10, 2020 1:25 am
Forum: Engine Tech
Topic: Looking to make some more power, welcoming ideas/advice
Replies: 57
Views: 2389

Re: Looking to make some more power, welcoming ideas/advice

You could get a g-force meter for your smartphone and do quick acceleration tests with and without air cleaner. Some of them have peak-and-hold features, so you don't need to watch while driving.
by Calypso
Mon May 04, 2020 8:08 am
Forum: Engine Tech
Topic: Piston oil squirters in NASCAR engines
Replies: 39
Views: 2830

Re: Piston oil squirters in NASCAR engines

Not really a direct answer as it is Honda F1, but should be relevant:

http://www.f1-forecast.com/pdf/F1-Files ... P2_08e.pdf
by Calypso
Tue Apr 21, 2020 1:01 am
Forum: Engine Tech
Topic: CDI + inductive ignition *combined*
Replies: 91
Views: 8887

Re: CDI + inductive ignition *combined*

In addition to the rev limiter, I also added "knock-finder" LED's, to show which cylinders are knocking (or being retarded), proportional nitrous retard, and test points to help you set up the rev limit, and boost retard Start and Rate controls. I also added an input to arm the rev limiter, so it c...