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Search found 285 matches

by LSP
Mon Sep 14, 2020 8:49 pm
Forum: Engine Tech
Topic: LS 243 milling
Replies: 25
Views: 963

Re: LS 243 milling

turbo camino wrote: Thu Sep 10, 2020 11:34 pm
LSP wrote: Thu Sep 10, 2020 9:31 pm I cut mine .110", no issues with Cometics at 12.8-1 and 615 hp
Wow. Around 50cc?
48.5 cc
by LSP
Thu Sep 10, 2020 9:31 pm
Forum: Engine Tech
Topic: LS 243 milling
Replies: 25
Views: 963

Re: LS 243 milling

turbo camino wrote: Mon Aug 31, 2020 3:01 am How much can 243s be cut down before they get too thin? Is it possible to get down to ~58cc (.050"ish)? I'm trying to puzzle out the best way to get a Gen4 5.3L from 10:1 up to around 10.8 or so.
I cut mine .110", no issues with Cometics at 12.8-1 and 615 hp
by LSP
Tue May 12, 2020 5:38 pm
Forum: Engine Tech
Topic: Installed height
Replies: 25
Views: 1232

Re: Installed height

Watch the bind height too, some of the PAC stuff will bind higher than advertised and could get you into trouble. Never seen that on PSI springs, always to the bind number or slightly less.
by LSP
Tue May 12, 2020 11:41 am
Forum: Engine Tech
Topic: OE Std. Volume Oil Pump GPM
Replies: 13
Views: 980

Re: OE Std. Volume Oil Pump GPM

Well, I got an answer, but Melling tested the sbc M-55 pump at 508 rpm, and the sbm M-72 pump at 310 rpm : /

Would it be a linear calculation if I adjust the M-72 to 508 rpm?
by LSP
Tue May 12, 2020 10:14 am
Forum: Engine Tech
Topic: OE Std. Volume Oil Pump GPM
Replies: 13
Views: 980

Re: OE Std. Volume Oil Pump GPM

Kevin Johnson wrote: Mon May 11, 2020 3:49 pm 517-787-8172, Ext. 2506 for Melling Tech line. I would think that they have graphs for flow through a calibrated orifice for the SBC and LA.
Left them a message, thank you : )
by LSP
Mon May 11, 2020 11:34 am
Forum: Engine Tech
Topic: OE Std. Volume Oil Pump GPM
Replies: 13
Views: 980

OE Std. Volume Oil Pump GPM

Looking for OE Std. volume oil pump GPM ratings for both a sbc and sbm from the same testing source.

Did a search that came up with a lot of info, but not that specifically.

Thanks
by LSP
Wed Mar 18, 2020 1:19 am
Forum: Engine Tech
Topic: Engine Masters rod ratio test results
Replies: 151
Views: 12532

Re: Engine Masters rod ratio test results

David Redszus wrote: Tue Mar 17, 2020 11:46 pm It is interesting to note that both Formula One and Cup engines run very long rods
with ratios above 2.0.
No, they don't
by LSP
Sat Mar 14, 2020 11:22 am
Forum: Engine Tech
Topic: Oil expander ring sets
Replies: 3
Views: 654

Re: Oil expander ring sets

Do you all know,are have you tried to install a expander oil ring set from say a set of piston that are ..060 ever into a piston oil groove that is .040 over both having the same axial and radial sizes, I guess what I want to know does the expander oil sets come in different sizes to certain point....
by LSP
Thu Mar 12, 2020 9:39 pm
Forum: Engine Tech
Topic: Whats Your Definition Of a Engine Builder ??
Replies: 37
Views: 3074

Re: Whats Your Definition Of a Engine Builder ??

Many definitions of an engine builder already stated, not sure I could elaborate any better. I will say that a premier engine builder to me is one who can pick the parts, build an engine combination to a fixed set of parameters/rules, and outperform the competition where the BS stops - on the scoreb...
by LSP
Tue Feb 25, 2020 7:00 pm
Forum: Engine Tech
Topic: Piston ring modifications
Replies: 17
Views: 1275

Re: Piston ring modifications

Are they allowing 2 ring set ups in SS? Yes, they have been allowed in Super Stock for many years. Most are on 3 rings, but when the piston compression height gets short enough to compromise the second ring land thickness (there is no minimum block deck height rule in Super Stock), then the 2 ring ...
by LSP
Sat Feb 22, 2020 12:33 pm
Forum: Engine Tech
Topic: Spring dampeners...needed or not?
Replies: 11
Views: 1334

Re: Spring dampeners...needed or not?

BlitzA64 wrote: Fri Feb 21, 2020 4:47 pm Many newer design springs don't use dampers they build heat and cut into stuff, I hate them. I use whatever is out there that doesn't have them and never had an issue street or race
X2
by LSP
Sat Feb 15, 2020 3:38 pm
Forum: Engine Tech
Topic: Choosing a cam for a 363 SBF
Replies: 10
Views: 640

Re: Choosing a cam for a 363 SBF

Thanks for the reply LSP. I haven’t ordered the rings yet. I do plan on using the gas ported ones you suggested. What kind of spring rate would you suggest for my application? 100+ lbs. more rate, the PAC 1325 installed .100" from coil bind looks good to me if you do want to get in the 8500 rpm ran...
by LSP
Sat Feb 15, 2020 2:59 pm
Forum: Engine Tech
Topic: Choosing a cam for a 363 SBF
Replies: 10
Views: 640

Re: Choosing a cam for a 363 SBF

I have a set of lunati rods. They have ARP 2000 bolts Here’s the part number and card Those rods seem quite robust, your short block should be 8500 rpm capable. Did you ever order those rings? Those springs don't have enough rate for an average intensity roller profile with your valves at that rpm ...
by LSP
Sat Feb 15, 2020 12:02 pm
Forum: Engine Tech
Topic: Piston wrist pin length
Replies: 68
Views: 5182

Re: Piston wrist pin length

How thick is it in the center?
by LSP
Sat Feb 15, 2020 12:00 pm
Forum: Engine Tech
Topic: Choosing a cam for a 363 SBF
Replies: 10
Views: 640

Re: Choosing a cam for a 363 SBF

You mentioned wanting to spin it as much as possible, what connecting rods do you have?