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Search found 1490 matches

by peejay
Sat Sep 14, 2019 6:15 pm
Forum: Engine Tech
Topic: Air/ fuel ratio data logger
Replies: 26
Views: 1120

Re: Air/ fuel ratio data logger

A common poor boy data logger is a video recorder pointed at the instruments. I believe capturing readable data requires analog gauges.. (or maybe a Super 8 camera) I've done this for years. That's the pisser. Digital video cameras do not work with LED based gauges due to the way LEDs are dimmed.
by peejay
Sat Sep 14, 2019 3:21 pm
Forum: Engine Tech
Topic: Articles about Ernie Elliot/ Bob Glidden
Replies: 2
Views: 553

Re: Articles about Ernie Elliot/ Bob Glidden

I miss the TOO forum, there were some interesting discussions there!
by peejay
Sat Sep 14, 2019 3:17 pm
Forum: Engine Tech
Topic: If you reuse MLS head gaskets...
Replies: 4
Views: 618

Re: If you reuse MLS head gaskets...

Is reusing MLS head gaskets common practice that has "NO" chance of regret or is their a percentage of, i should have just bought new ones ? Mark H. :?: If you have to pull the heads off before the engine even fires because you find out the dipsh* who cut the valves used the wrong collet and the va...
by peejay
Sat Sep 14, 2019 7:08 am
Forum: Engine Tech
Topic: If you reuse MLS head gaskets...
Replies: 4
Views: 618

Re: If you reuse MLS head gaskets...

I've only ever used any "new" sealant like Copperkote if the old sealant stuck to the deck when removing the gasket. If it came off clean, it can go right back on again. Because of this, there should be no reason to have to clean and reseal each individual layer. As long as it stayed riveted togethe...
by peejay
Tue Sep 10, 2019 8:41 pm
Forum: Engine Tech
Topic: Ls 3 cylinder walls cracked
Replies: 5
Views: 502

Re: Ls 3 cylinder walls cracked

Is it common for a ls3 bored to 4.070 to crack the cylinder walls vertically? #3 and #5 . The build is 11.2 to 1. cathedral port trick flow heads, ls6 intake, dry sump 7400 rpm's road race use. 450 hp 445tq at the rear wheels. It also has been losing the ground straps off the spark plugs. I suspect...
by peejay
Sun Sep 08, 2019 8:20 pm
Forum: Engine Tech
Topic: Finally figured out how to move some air on these heads...
Replies: 14
Views: 1087

Re: Finally figured out how to move some air on these heads...

D832E6C0-2C93-4F16-B431-A01B879A10AF.jpeg Can you use water jackets as an intake port? :lol: :lol: :lol: Wankel engines need the insides of the rotors cooled, which is usually done with stonkin' big oil coolers half the size of the water radiator. Sachs air-cooled Wankels used for lawnmowers (!) dr...
by peejay
Sun Sep 08, 2019 8:42 am
Forum: Engine Tech
Topic: Freezing tri metal bearings with Liquid Nitrogen
Replies: 24
Views: 956

Re: Freezing tri metal bearings with Liquid Nitrogen

I can say from expereince that heating cast aluminim bike cases to 212 F will let a 3 inch diameter roller bearing with a .002 press fit fall out on it's own or a slight blow from a drift....There's been some disagreement on heating hotter than 230F or so and possible effects on the aluminum that i...
by peejay
Sat Sep 07, 2019 7:34 pm
Forum: Engine Tech
Topic: 4150 base plates with throttle shaft bearings?
Replies: 1
Views: 277

4150 base plates with throttle shaft bearings?

Does anybody make a base plate for 4150 carbs that uses bearings on the throttle shafts, or at least a seal of some type?

I am trying to eliminate any and all unfiltered air from a certain application.
by peejay
Sat Sep 07, 2019 7:31 pm
Forum: Engine Tech
Topic: LS1 Running hot
Replies: 9
Views: 454

Re: LS1 Running hot

Have you done any web searches on bleeding an LS cooling system? They seem to be prone to air pockets, hard to bleed and very critical for cooling. https://www.bing.com/search?q=bleeding+an+ls+cooling+system&pc=MOZI&form=MOZSBR Only if you eliminate the air bleeds in the heads. I prefer a four corn...
by peejay
Fri Sep 06, 2019 9:07 pm
Forum: Engine Tech
Topic: Freezing tri metal bearings with Liquid Nitrogen
Replies: 24
Views: 956

Re: Freezing tri metal bearings with Liquid Nitrogen

Wow! How much interference fit do they have that 250 isn't enough? I admit that I haven't fought the particular demon you are fighting, but I've had aluminum housings that would stall a 20 ton press trying to force a race in, that ten minutes in a 250F oven would have a household freezer-cold race f...
by peejay
Mon Sep 02, 2019 11:04 am
Forum: Engine Tech
Topic: What's the ideal injector trajectory angle?
Replies: 39
Views: 1422

Re: What's the ideal injector trajectory angle?

This is the reason I'm asking ...this is a head I done recently which was one of the worst for carbon build up in the intake port...1/4" thick which had to be chiseled out . It was a low mile clean well cared for engine, ran great. 2002 6ltr LQ9 #317 heads. The backside of the intakes also had real...
by peejay
Mon Sep 02, 2019 10:27 am
Forum: Engine Tech
Topic: 1991 c4 corvette L98 engine questions, options, mass confusion.
Replies: 46
Views: 1213

Re: 1991 c4 corvette L98 engine questions, options, mass confusion.

Also, no emissions checks here, so egr, a.i.r. injection etc can go. Big thing here is keeping the outward appearance of OEM, meaning all guage and ac etc work. Any intake setup is fine provided if can be tuned with the OEM computer, obviously with a new prom burnt and time on the dyno. EGR and AIR...
by peejay
Sun Sep 01, 2019 8:44 pm
Forum: Engine Tech
Topic: 1991 c4 corvette L98 engine questions, options, mass confusion.
Replies: 46
Views: 1213

Re: 1991 c4 corvette L98 engine questions, options, mass confusion.

Good thing that isn't a C4 :mrgreen: Did you already sell that engine you had listed for like $2k on Facebook, Chad? You think it made 300? I'm no expert, I'm not even a never-was-pert, but I had more fuel injector than that and didn't even make 275 at the clutch before the injectors were running s...
by peejay
Sun Sep 01, 2019 6:49 pm
Forum: Engine Tech
Topic: 1991 c4 corvette L98 engine questions, options, mass confusion.
Replies: 46
Views: 1213

Re: 1991 c4 corvette L98 engine questions, options, mass confusion.

A C4 that doesn't have the "Tokyo by night" instrument cluster is more of a crime IMO :)
by peejay
Sun Sep 01, 2019 1:00 pm
Forum: Engine Tech
Topic: It runs faster on low octane fuel?
Replies: 32
Views: 1476

Re: It runs faster on low octane fuel?

Formula 1 teams use lowest octane rating allowed by rules, which is 95, european ron/mon I think. Because it makes most power. Because of the horrible chamber shape dictated by the massively oversquare layout, and the high RPM used, they are power limited by flame propagation speed. Solution: Run i...