370cidZ06

iTrader: (2)

Changing cam out and it's going to drop my dynamic compression to borderline pump didn't know if anyone could tell me to try pump or stick with race fuel. My static comp is 13.7:1 and dynamic is 9.8:1-10.1:1 according to cam designer and 2 other calculators. Any info/input would be much appreciated. Also I will be spraying a 175 hit

03Sssnake

iTrader: (20)

8:4/5 dynamic comp max for pump gas

soundengineer

iTrader: (16)

Dcr of 10:1 is pretty dam high...

High 8 to low 9 is easy on pump gas...

You can do more, but you are going to need a colder plug and pull some timing.

370cidZ06

iTrader: (2)

Ok I figured that I was gonna hae to keep running 110 just didn't know if anyone has tried etc thanks anyone else has any input keep it coming .......

Thoughts if a mix of 110 and 93

Or

93 and meth

99Bluz28

iTrader: (35)

Whats your head gasket thickness? Consider trying a .060" gaskets, and chose a wider lsa for the cam along with cooler plugs.

370cidZ06

iTrader: (2)

It's .051 compressed and cam Lsa is 114+3 on a 111 centerline here are custom cam specs 235/246 .638/.615" 114LSA +3 camshaft recommendation. This profile features the all-new EHI lobes for the intake and LXL lobes for the exhaust. The EHI lobes have an endurance profile which means they open & close in a more controlled manner on/off the seat. They have really fast ramps once under way which means they'll make more power than the LSL/LSR lobes from Comp while having better control at higher rpm. The LXL lobes for the exhaust have a nice soft close which will make considerably less sewing machine valvetrain noise than other higher lift lobes on the market.


I run 8 heat range plugs

99Bluz28

iTrader: (35)

How about Methanol injection (Snowperformance stg 3) to get the octane level up.
Here's a link to a thread about it.
https://ls1tech.com/forums/fueling-i...ion-n-use.html

370cidZ06

iTrader: (2)

I was thinking about that but was concerned with pinging under normal driving and idling conditions

99Bluz28

iTrader: (35)

I'd, preferably Call (or email) Snowperformance to find out for sure.

You might even want to consider new heads..

JakeFusion

iTrader: (7)

Or a new cam. Part of having the correct cam isn't just valve events, it's about working in the motor you already have. If you already have heads and the engine setup a certain way, the custom cam should take that into account and the fuel you'll be running.

And DCR calculators are a bit hazy. Lots of folks run higher than 9:1 with smaller cams and milled ported heads, so don't invest too much stock in them, just use them as a general guide, not the absolute gospel.

370cidZ06

iTrader: (2)

I understand that, even with 70cc heads my compression static s 12.3:1. problem is I'd rather run race gas or meth right now vs. spending another 600 on stock ls3 heads and still be low to mid 9s on dynamic compression. My cam right now has me at 11.75:1 on dynamic completely wrong cam i know i just kinda through it in since it was cheap and I was itching. If I could find someone with stock cc ls3 heads that wanted 62cc heads and kinda swap that would be nice but no one really wants mills ls3 heads milled .040. Lol oh well no biggie fellas I like the power car makes with the compression and should pick up even more with new cam not to mention if I port heads and a better intake thanks guys

JakeFusion

iTrader: (7)

You could retard it 3-4 degrees as well if you needed to. Cheaper to buy an adjustable timing set than new heads.

370cidZ06

iTrader: (2)

Have adjustable setup already so that may work just trying to explore my options if I will make considerably more on 110 them I'm honestly probably gonna run that

Grr

iTrader: (2)

you must have like a 10cc dome in there or something? Any more details you can give and what cam do you ahve now?
What are teh advertised specs of the cams

JakeFusion

iTrader: (7)

Yeah the setup sounds whack. Give us details.

370cidZ06

iTrader: (2)

11cc dome 370 CID cam now is a eps 244/248 612/615 112+2 Lsa lsl/lsr lobes cam I will be ordering 235/246 638/615 114+3 Lsa ehi lobes. car currently makes 500 on a mustang dyno stock ls3 heads and intake conservative timing do to when we dynoed it was 110* out with 15% humidity so didn't wanna throw a lot in and regret it with cold weather . I will be spraying a 175 hp forgot to mention that sorry

370cidZ06

iTrader: (2)

Just did said 104 oct or better it might ping below where their kit operates even just normal driving below 3k

370cidZ06

iTrader: (2)

I was also entertaining the idea of e85 I am at only 67% injector duty cycle

Grr

iTrader: (2)

E85 is the only way man. My new setup is 10.6DCR and the old was high 9's, no problems at all. I have 80# injectors and dual walbros

370cidZ06

iTrader: (2)

My issue would be having to test every full up and a lot of local e85 users always get black sludge build up in filters?