Search found 110 matches
- Tue Dec 06, 2022 8:40 pm
- Forum: Engine Tech
- Topic: Burn patterns on piston and chamber
- Replies: 128
- Views: 19474
Re: Burn patterns on piston and chamber
When I tear it down I can get pics of chambers.Heads and cam is nothing exotic or not used many times before. Heads are 2.200 -1.585 .Int is 52 deg and 91.5 throat.Upper csa at flange is 3.020".6mm intake valve. Cam is 27.5 ,69.5 int ..on ex 82 ,28. 114 lsa in on 111 icl. .865 lift int..820 ex....
- Tue Dec 06, 2022 7:05 pm
- Forum: Engine Tech
- Topic: Burn patterns on piston and chamber
- Replies: 128
- Views: 19474
Re: Burn patterns on piston and chamber
We were running like 9.04-9.06 and 148 mph.We were just altering some poor fuel to find a little more power.Our timing was on edge for fuel being used ,it got me my 8.98 and 150 mph ticket tho.We had made enough attempts and realized I probably didn't have enough fuel to drive back home 55 miles.So...
- Tue Dec 06, 2022 10:14 am
- Forum: Engine Tech
- Topic: Burn patterns on piston and chamber
- Replies: 128
- Views: 19474
Re: Burn patterns on piston and chamber
Back in early to mid 90s we worked on and ran a pavement late model class.Short track.360 was max allowed.Factory iron head or dart 2 was it.No porting just what you could get at with valve cutter and cutter for throat.10.00 to1 rule.We started with flat tops and made more power with a slight revers...
- Tue Dec 06, 2022 8:50 am
- Forum: Engine Tech
- Topic: Burn patterns on piston and chamber
- Replies: 128
- Views: 19474
Re: Burn patterns on piston and chamber
200,000 mile stock LS head ,did this test years ago, and it's spark plug. 1st thing I noticed was black on plug is exactly where the blue hit the plug on bench. All 8 old plugs had same black spot. Sanded carbon off before flowing so I could see where the dye hit You ever knock that knob clear out ...
- Tue Dec 06, 2022 8:46 am
- Forum: Engine Tech
- Topic: Burn patterns on piston and chamber
- Replies: 128
- Views: 19474
Re: Burn patterns on piston and chamber
If he added texture to the pistons would that allow more incomplete combusted hydrocarbons to adhere to the piston with no real change to the status quo? Piston top would read different than with a shiny top that carbon is less susceptible to stick to with no difference in outcome? What do you find...
- Mon Dec 05, 2022 11:37 am
- Forum: Engine Tech
- Topic: Burn patterns on piston and chamber
- Replies: 128
- Views: 19474
Re: Burn patterns on piston and chamber
You run b32,b33,or b37 Phillips back in yester year?SpeierRacingHeads wrote: ↑Mon Dec 05, 2022 10:24 amNHRA has a list of fuels. Tried them all. It made the same power with VPc12 and I like the smell. Brings back memories!
- Mon Dec 05, 2022 10:04 am
- Forum: Engine Tech
- Topic: Burn patterns on piston and chamber
- Replies: 128
- Views: 19474
Re: Burn patterns on piston and chamber
We were running like 9.04-9.06 and 148 mph.We were just altering some poor fuel to find a little more power.Our timing was on edge for fuel being used ,it got me my 8.98 and 150 mph ticket tho.We had made enough attempts and realized I probably didn't have enough fuel to drive back home 55 miles.So...
- Mon Dec 05, 2022 9:59 am
- Forum: Engine Tech
- Topic: Burn patterns on piston and chamber
- Replies: 128
- Views: 19474
Re: Burn patterns on piston and chamber
You could pull a bunch of fuel out of that.Your pistons don't have near enough coverage imo.Need to get some texture too them. If he added texture to the pistons would that allow more incomplete combusted hydrocarbons to adhere to the piston with no real change to the status quo? Piston top would r...
- Sun Dec 04, 2022 4:46 pm
- Forum: Engine Tech
- Topic: Intake Manifold Porting Show ‘n Tell
- Replies: 760
- Views: 852122
Re: Intake Manifold Porting Show ‘n Tell
Have ran 2927 on 427 through 496 many times.Old dart worked fine back in day with a little work.Didnt have many choices when they came out.So we learned how to make them work.My personal go too would be sniper jr
- Sun Dec 04, 2022 3:00 pm
- Forum: Engine Tech
- Topic: Burn patterns on piston and chamber
- Replies: 128
- Views: 19474
Re: Burn patterns on piston and chamber
We were running like 9.04-9.06 and 148 mph.We were just altering some poor fuel to find a little more power.Our timing was on edge for fuel being used ,it got me my 8.98 and 150 mph ticket tho.We had made enough attempts and realized I probably didn't have enough fuel to drive back home 55 miles.So ...
- Sun Dec 04, 2022 2:17 pm
- Forum: Engine Tech
- Topic: Burn patterns on piston and chamber
- Replies: 128
- Views: 19474
Re: Burn patterns on piston and chamber
https://scontent.fmmx4-1.fna.fbcdn.net/v/t39.30808-6/313331380_5128605613912632_8354222126848402811_n.jpg?_nc_cat=101&ccb=1-7&_nc_sid=dbeb18&_nc_ohc=v4F40NrioXcAX_2tKOD&_nc_ht=scontent.fmmx4-1.fna&oh=00_AfAef5_6NtRZGqnC9UVC-bWiaQk64bgkfaNbZ9XMyRAykw&oe=639147E8 With burr fin...
- Sun Dec 04, 2022 2:13 pm
- Forum: Engine Tech
- Topic: Burn patterns on piston and chamber
- Replies: 128
- Views: 19474
Re: Burn patterns on piston and chamber
My chambers on the L-29 heads and piston crowns looked super after using a burr finish in the intake ports and chambers. I am sold on doing the burr finish after testing it with 2 different sets of heads. Never had intake ports so clean after a few races. I have never needed any reason to use a bur...
- Sun Dec 04, 2022 1:37 pm
- Forum: Engine Tech
- Topic: Burn patterns on piston and chamber
- Replies: 128
- Views: 19474
Re: Burn patterns on piston and chamber
I have 383 street strip car.It has 1600 miles on it and 40 plus 1/4 mile passes on it.It gets driven to and from track pulling trailer with tires,gears,tools etc.13.35 to 1 comp.Its E30 pump gas ethanol blend.It weighs 3450ish with me.last time out we were trying to get to 120 mph in 1/8th and in 8s...
- Sun Dec 04, 2022 12:46 pm
- Forum: Engine Tech
- Topic: Intake Manifold Porting Show ‘n Tell
- Replies: 760
- Views: 852122
Re: Intake Manifold Porting Show ‘n Tell
That has some area.Guessing that not for pickup pulling a camper.lol
- Sun Dec 04, 2022 11:26 am
- Forum: Engine Tech
- Topic: Burn patterns on piston and chamber
- Replies: 128
- Views: 19474
Re: Burn patterns on piston and chamber
https://scontent.fmmx4-1.fna.fbcdn.net/v/t39.30808-6/313331380_5128605613912632_8354222126848402811_n.jpg?_nc_cat=101&ccb=1-7&_nc_sid=dbeb18&_nc_ohc=v4F40NrioXcAX_2tKOD&_nc_ht=scontent.fmmx4-1.fna&oh=00_AfAef5_6NtRZGqnC9UVC-bWiaQk64bgkfaNbZ9XMyRAykw&oe=639147E8 With burr fin...