Cold start with out grid heater video

[Kman9090]

15:1 with ddp comps!

 

[Rollin Coal]

15:1 with ddp comps!

who's pistons? When i go into my motor i want to drop the comp ratio a little bit.

 

[Kman9090]

im pretty sure there stock pistons just flycut

 

[Rollin Coal]

do you know how much gets cut off to get it down to 15.5-16:1?

 

[Kman9090]

dont know for sure but ill talk to the guy that did it and can find out for you!

 

[rpainter]

I think mine is just under .070 off the top of the piston

 

[Rollin Coal]

and what does .070 bring it to?

 

[nate]

No way!

Try to fire up a truck when it's even just -10 out without grids... it won't happen. When it's -20 or -30 I let the grids cycle 2 or even 3 times before turning it over.

Grid heaters are mainly to keep the white smoke down on cold starts then to assist the truck in starting.

 

[Highfinance97]

No way!

Try to fire up a truck when it's even just -10 out without grids... it won't happen. When it's -20 or -30 I let the grids cycle 2 or even 3 times before turning it over.

I do it too.... It only helps!!

 

[rpainter]

and what does .070 bring it to?

never figured it out but I was told in the area of 14.5 :1

 

[rpainter]

anyone have the chart in order to figure compression ratio??

 

[Rollin Coal]

stock on a SO 24v is 16.7:1

knock .070 off the pistons is 13.7:1

 

[Rollin Coal]

.020 over is 15.7:1
.040 over is 14.8:1
.060 over is 14.1:1
.080 over is 13.4:1

 

[rpainter]

stock on a SO 24v is 16.7:1

knock .070 off the pistons is 13.7:1

CR motors have 17.2:1 compression so I am just over 14:1 compression

 

[Rollin Coal]

CR motors have 17.2:1 compression so I am just over 14:1 compression

wow, CR's are up there. how does it run the rest of the time with the 14:1? how much boost are you pushing? what turbo?

THanks

 

[rpainter]

wow, CR's are up there. how does it run the rest of the time with the 14:1? how much boost are you pushing? what turbo?

THanks

runs cool. boost level is 50 psi from a silver bullet

 

[Rollin Coal]

did you gain anything from it? i have a 66/71/14, may do twins in the future. im looking for 600+ out of my truck my, i may need a turbo bigger than the 66 to get there, so id put an s475 under it if i went that route. i can see doing it for 70, 80, 90 or more psi, but does it hurt power with the lower boost levels?

 

[Ph4tty]

My 01 wont start if its below 40 unless its plugged in! Well it does but it will sit there and slobber all over itself and miss and will smoke out the whole subdivision! Might be due to low compression, mild cam, and 250hp injectors! It really doesnt like temps under 65!

I think compression is the main factor here. 150 sticks and a h2 and this truck starts on the 3rd rev every time even when cold. Never seen it below 0, but 20 F isn't uncommon for Va.

 

[Ph4tty]

did you gain anything from it? i have a 66/71/14, may do twins in the future. im looking for 600+ out of my truck my, i may need a turbo bigger than the 66 to get there, so id put an s475 under it if i went that route. i can see doing it for 70, 80, 90 or more psi, but does it hurt power with the lower boost levels?

I know 550-600 hp can be done on less than 40 lbs of boost on a single turbo. Things like a cam or high flow intercooler actually drop boost.

 

[Rollin Coal]

We'll see what i put down, my 01 is non intercooled with a ton of water/meth