whos got them real low stump pulling gears????

srtthis · Sep 7, 2011

the idea of 4.30's and 4.56's have been crossing my mind with a 28" rear tire (275/60's)

running the numbers a 4.56 @5500 through the traps would be 100mph in 4th gear. 4.30's would be 107mph
this REALLY doesnt seem right.
even pulling it to 6000 in 4th only will take it to 116...

this seem REALLY low to anyone else?

Rick 91GT · Sep 7, 2011

Ran 4:30, 4:56 and 4:88 in the NMRA P/S stuff but we were turning more rpm 7700+

NIKwoaC · Sep 7, 2011

I think most of the guys who would run gears like that aren't planning on trapping at 5500. More like 6500, if not higher. I think if you want to run gear like that, you can't be afraid of spinning the engine.

Realistically, what do you think your car might trap at? 116 in a 3000lb car is North of 350 to the tire.

90lxcoupe · Sep 7, 2011

I'd say your numbers are right on the money. I think with your setup a 3.73 and 26" tire will work well.

srtthis · Sep 7, 2011

Rick 91GT said:
Ran 4:30, 4:56 and 4:88 in the NMRA P/S stuff but we were turning more rpm 7700+

haha ive talked with ryan hecox a few times and i know hes shifting near 8500

if my girl would let me build a motor id do it... but i dont think something like that is in "her" budget

Noobz347 · Sep 7, 2011

srtthis said:
haha ive talked with ryan hecox a few times and i know hes shifting near 8500

if my girl would let me build a motor id do it... but i dont think something like that is in "her" budget

Meh... buy her a ROCK and press forward.

srtthis · Sep 7, 2011

Noobz347 said:
Meh... buy her a ROCK and press forward.

haha she has 40 rocks on her finger... (no lie one of them has 32 rocks in it)

its still a no go

Noobz347 · Sep 7, 2011

srtthis said:
haha she has 40 rocks on her finger... (no lie one of them has 32 rocks in it)

its still a no go

Hmmmm.... the Rocks are strong with this one. More insidious measures will have to be considered.

I'll have to think on it and PM you with a more strategic plan.

srtthis · Sep 7, 2011

Noobz347 said:
Hmmmm.... the Rocks are strong with this one. More insidious measures will have to be considered.

I'll have to think on it and PM you with a more strategic plan.

haha weddings in october if thats what your thinking

Noobz347 · Sep 7, 2011

srtthis said:
haha weddings in october if thats what your thinking

View attachment 174186

Strong, is the attraction of the Dark side. Yourself and your toys, you will lose. STRONG YOU MUST BECOME! Or forever lost, shall you be.

Rick 91GT · Sep 7, 2011

LMFAO.... @ Noobz

Yeah it is common place to go 8200rpm+, kinda amazing isnt it?

srtthis · Sep 7, 2011

Rick 91GT said:
LMFAO.... @ Noobz

Yeah it is common place to go 8200rpm+, kinda amazing isnt it?

yea on stock ****in lifters!id really like to know how thats done

btw any idea what could cause a broken piston skirt?

90mustangGT · Sep 7, 2011

The hight of the tire has everything to do with this. A 4.30 isn't that steep with a 28" tall tire. It's more like a 4.10. Very rough estimate but for ever inch up on the tire, it's about a tenth down on the gear.

Green 94 5.0 · Sep 7, 2011

srtthis said:
haha ive talked with ryan hecox a few times and i know hes shifting near 8500

if my girl would let me build a motor id do it... but i dont think something like that is in "her" budget

Dude, my chick would find the curb way before the altar if she ever told me what I could and couldn't buy with "her" money.

Rick 91GT · Sep 7, 2011

D, I know how to do it, not really that hard Id rather not post my secrets though...

Rick 91GT · Sep 7, 2011

To N20 will break skirts

Your car or race car?

srtthis · Sep 7, 2011

I understand tire height will help kill some gear but the mph to the rpm doesn't seem right when I ran they numbers

LarsD · Sep 7, 2011

Green 94 5.0 said:
Dude, my chick would find the curb way before the altar if she ever told me what I could and couldn't buy with "her" money.

+1 to this.

srtthis · Sep 8, 2011

Rick 91GT said:
To N20 will break skirts

Your car or race car?

it was the race car... its why we had to pull the motor saturday night again.

Rick 91GT · Sep 8, 2011

Who's piston?

Skirt fracture is usually the result of excessive piston to cylinder wall clearance.

whos got them real low stump pulling gears????

srtthis

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