Official TVS Thread!!!
12-05-2012, 01:04 PM
#3476
Im hoping to dyno it this month with the new electric water pump setup..
i made it past 500 with 150 shot...it lifted the head and blew the hg at like 6500
12-05-2012, 01:12 PM
#3481
12-05-2012, 10:26 PM
#3484
My cooling mods are gonna be zzp steath h/e and dual pass. I am going full E and i was considering 2.8 but kinda wanted that extra tq iv heard the 2.7 will give, my redline is 7k so i dont think in spinning it too far out of its efficiency range. From what im reading in ur post it seems adding the water may backfire on me because it will cool my sc but power loss from it being non combustible so unless imgoing ***** out with a 2.5 then dont waste my time? Ill stick with the 2.7 for now and when my build is finish ill get an idea how my iat2 reacts to it, im only really worried about summer time tho living in ga it gets mother ******* hot and humid as a ball sack so ill see how it reacts when the next summer rolls around.
A 2.7 vs 2.8 is insignificant, what you've read/heard is nothing more than hear say.
Take your stock crank (6.5") multiply by MAX engine RPM (7000 in your case) and divide by the sc pulley used.
Your blower RPM comes out to 16,851.85 RPM @ 7000 engine RPM. The Eaton m62 efficiency charts read to a max of 14000 rpm. There is a reason why the stock m62 pulley is said to be at the edge of the superchargers peak efficiency on a stock LSJ. (12,611.94 sc rpm = 3.35" pulley on a 6.5" crank @ 6500 rpm)
Here's the deal with "water" being injected... The more your spray, the greater the knock suppression, the cooler the egts, cyl temps & IATs, the lesser the combustion will become over all.
In a real world test, Euthanasia and I took our cars to a local dyno.
We both had identical 2.5 ported m62 setups @ 19.5-20 PSI with full bolt ons.
Our differences were, I ran 10gph 100% methanol on a stock head. He ran 10gph 50/50 mix on a port matched head.
Both tunes ran a solid AFR of 11.5-11.6 to a redline of 7000. His car being on a 50/50 mix easily allowed 15-17* midrange timing with a gradual increase to redline peaking @ 24.5-25* advance. With iat2 temperature not going past 120* F.
Where as 100% methanol allowed 17-18* peak advance by redline, any further advance would cause detonation. My midrange was 12-14* advance, with IAT2 getting into the 140s by redline.
I ended up dynoing 265whp/250ft lbs
Euthanasia put down 253whp/238 ft lbs
To add, Euthanasia's engine was freshly rebuilt and broken in, where as I had already 105,000 on the engine with a decent amount of blow by to rule that out of the equation.
Basically you're left with 50/50 vs 100% methanol... A 50/50 methanol mixture will provide an excellent barrier against knock and provide much better cooling at the cost of power.
You can also look at it this way, you can run a greater methanol mixture and produce as much power on less timing advance reducing the over all stress on the engine.
As for summer time... keep your foot out of it and save it for a nice cool night.
Last edited by 100% METH; 12-05-2012 at 10:59 PM.
350 shipped has ac brackets hahaha anyways....
12-06-2012, 12:38 PM
#3497
Senior Member
iTrader: (11)
Join Date: 12-21-09
Location: Kaysville UT
Posts: 1,950
Likes: 0
Received 0 Likes
on
0 Posts
12-06-2012, 01:51 PM
#3498
I thought about picking up the Griffin at that price, but I do not need it currently, and decided to hold off since I'm focusing on the valvetrain this winter.