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Search found 1999 matches

by CGT
Fri Oct 16, 2020 11:38 am
Forum: Engine Tech
Topic: Ignition timing after porting
Replies: 13
Views: 827

Re: Ignition timing after porting

The bottom line is that without a Intake flowtest being done you do not know if out of the box any given head even needs it short turn layed back or rearced! No. The bottom line is without doing a dyno or track test you don't know. Your test would have a basis in assumption...which may or may not b...
by CGT
Fri Oct 16, 2020 10:35 am
Forum: Engine Tech
Topic: Comp LSR lobes
Replies: 17
Views: 1171

Re: Comp LSR lobes

Can somebody explain the Comp custom grind format for me? The catalog seems to be missing the part that gives the prefixes for each engine family. I'm able to figure out that CB is BBC and CS is SBC from the examples, but the others are a mystery. I know the core will be 54-000-11 and lobes are 130...
by CGT
Fri Oct 16, 2020 10:11 am
Forum: Engine Tech
Topic: LS stand alone ignition controller ?
Replies: 8
Views: 563

Re: LS stand alone ignition controller ?

Why not run solid core wire and resistor plug ends like the european cars use. Here is one, BOSCH 0356100015 Thats been suggested to me, But I haven't seriously looked into it, ....and am not familiar with it. I will have to address it before I put it on the dyno next time for sure. I just didn't k...
by CGT
Fri Oct 16, 2020 8:54 am
Forum: Engine Tech
Topic: LS stand alone ignition controller ?
Replies: 8
Views: 563

Re: LS stand alone ignition controller ?

I use the Daytona sensor unit. I was told by a couple people that had ran the MSD controller, that the Daytona control was an "upgrade". I can't speak for that since I haven't run the MSD personally, but it seems to be really nice. It has performed well, the software is nice and easy to use. I have ...
by CGT
Tue Oct 13, 2020 10:51 am
Forum: Engine Tech
Topic: Comp LSR lobes
Replies: 17
Views: 1171

Re: Comp LSR lobes

If a noisy lobe doesn't do anything other than make noise I don't care, but if the noise is coming from parts getting beat up I'd rather avoid. With the right springs and good pushrods, are there reliability issues with noisy lobes in a daily-driver low maintenance type of application? RPM will not...
by CGT
Tue Oct 13, 2020 9:17 am
Forum: Engine Tech
Topic: Comp LSR lobes
Replies: 17
Views: 1171

Re: Comp LSR lobes

Turbo, If your wanting to keep things budget. Im sure your probably aware of the GMPP LS6 spring kit. They could be had for around 75.00 last time I looked. They work really good if you keep the lobe instensity down and around .560 lift. #12499224
by CGT
Mon Oct 12, 2020 2:53 pm
Forum: Engine Tech
Topic: Top piston ring gap - whats really required?
Replies: 34
Views: 1697

Re: Top piston ring gap - whats really required?

As I have said before just because it is published it doesn't mean that's what they come with. When you measure a new engine and the engine has got .009 then I'll be more receptive of factory published tolerances. True. Im not soliciting to anyone or myself to run .009, but it wouldn't surprise me ...
by CGT
Mon Oct 12, 2020 1:52 pm
Forum: Engine Tech
Topic: Comp LSR lobes
Replies: 17
Views: 1171

Re: Comp LSR lobes

The short seat duration with that much lift is what has me worried, not just the lift alone. With no real data to go on my gut says that's a very aggressive lobe. They are in my opinion....and noisy. The LSR-LSL-LXL aren't quite as clattery as some of the previous stuff (XFI-XER, XE) but if its gon...
by CGT
Mon Oct 12, 2020 10:31 am
Forum: Engine Tech
Topic: Top piston ring gap - whats really required?
Replies: 34
Views: 1697

Re: Top piston ring gap - whats really required?

Screenshot (39).png 2018 Supercharged LT4 mechanical specifications. 650hp supercharged. Not uncommon for these to be making several hundred more horsepower than that on the stock shortblock….And could have .009 top ring end gap. I could never get myself to run ring end gaps like that, but it makes...
by CGT
Tue Oct 06, 2020 8:41 am
Forum: Engine Tech
Topic: Cast iron heads, surface rust
Replies: 7
Views: 596

Re: Cast iron heads, surface rust

rebelyell wrote: Mon Oct 05, 2020 10:58 pm NAPA's Aluminum Brightener has a big dose of Phosphoric Acid.
Other brands similar
That's my next go-to after the CLR....but requires more caution than the CLR. I have had real good luck with it.
by CGT
Mon Oct 05, 2020 4:25 pm
Forum: Engine Tech
Topic: Cast iron heads, surface rust
Replies: 7
Views: 596

Re: Cast iron heads, surface rust

Any of you had decent results using a light solution of clr for rust removal on heads and blocks. I use CLR for a lot of stuff like that. Works good while not being too crazy strong. Makes aluminum blocks and heads look much nicer also....usually. It can make freshly machined surfaces look a little...
by CGT
Thu Oct 01, 2020 3:22 pm
Forum: Engine Tech
Topic: SBC LT1 / vortec compatability
Replies: 29
Views: 835

Re: SBC LT1 / vortec compatability

Im pretty sure the difference is the length of the dowel pin. Seems like Ive gotten a late model step nose sbc cam that came with 2 different length pins.
by CGT
Thu Sep 24, 2020 10:09 am
Forum: Engine Tech
Topic: LS adapter plates
Replies: 1
Views: 169

Re: LS adapter plates

I've seen a couple sets, not sure of the brand. They fit "ok"....as good as can be expected. There is no way to make that transition "nice". I guess they serve their purpose. Certainly nothing you'd want on a NA engine. Obviously not ideal for anything as far as that goes.
by CGT
Tue Sep 08, 2020 10:30 am
Forum: Engine Tech
Topic: LS 243 milling
Replies: 25
Views: 1057

Re: LS 243 milling

Yeah, thats how it reads to me also....has to be a mistake but I'd definitely try to capitalize on it.
by CGT
Tue Sep 08, 2020 9:03 am
Forum: Engine Tech
Topic: LS 243 milling
Replies: 25
Views: 1057

Re: LS 243 milling

Anyone used GM gaskets, 12498544? $50/pair, .051" thick, but listed as 3.91" which happens to be the same size as the 243 chambers. The smallest "5.3L" gaskets are 3.95" bore. I'd jump on that. 12498544 has a MSRP of 51.93 ea. Dealer's cost is 38.95 per. So its either a mistake, or someone is wanti...