is cutting 2 drop coils a bad idea?

[Driveway Dreams]

Smaller tires would lower the ride height but will also change your tire gaps and such.

[dbmx66]

Originally Posted by Driveway Dreams

Smaller tires would lower the ride height but will also change your tire gaps and such.

is that a bad thing?

[MrBeast]

Also remember this when it comes to tire size, shortening the tires is going to greatly increase engine speed.

For instance I belive the stock tire for your truck was a 235/75r15 that is 28.88 inches in diameter, with a 3.55 rear end and a TH700R4 you will run 2,111 RPM @ 70 MPH,

If you go with a 26.88" tire on the same truck, you raise the RPM's to 2,269 RPM

That is a 158 RPM increase.

This has a lot to do with why big wheels have become so popular because they allow you to run a short side wall tire, achieve a look and keep your engine rpm's down and thus keep your fuel mileage up.

[MrBeast]

Originally Posted by dbmx66

is that a bad thing?

It is really a matter of personal preference, but putting too small of a tire on your truck can really make it look weird.

Let me just throw a thought at you though on the subject...

I have noticed that you are pretty fixated on lowering the truck substancially, you will be better served taking baby steps, getting the truck going with the parts you have now, get it assembled where you can look at it, then worry about the sizing of your tires and wheels, as well you will need to have the truck assembeled to measure for offset on your wheels as well.

[dbmx66]

well the tires that are on not a really badly dry rotted. so i need tires

would 225/60-r15 be to small you think? 25.60 inch diameter. thats only like 3 inch difference than the 235/75-r15s i have on now.

[MrBeast]

you have a 700R4? and what rear end ratio?

[Driveway Dreams]

I am dropped a little over 5/7 running Cooper Cobra 245/60/15 And I don't think I would go any smaller tire wise.

[dbmx66]

Originally Posted by MrBeast

you have a 700R4? and what rear end ratio?

350 turbo as of right now, rebuilding a 400 turbo. right now i have 3.73 but prolly putting 4.11s

[dbmx66]

i saw this truck on here. what size you think they are?

[MrBeast]

Originally Posted by dbmx66

350 turbo as of right now, rebuilding a 400 turbo. right now i have 3.73 but prolly putting 4.11s

With either the TH350 or TH400 you will have the same RPM's because they both have a 1:1 final drive ratiio.

With the 235/75R15's and 3.73's you will pull 3,093 RPM @ 70 MPH
With the 225/60R15's and 3.73's you will pull 3,429 RPM @ 70 MPH

if you go to 4.11's with the 225/60R15's you will pull 3,778 RPM @ 70 mph.

If you were to put a DOT slick on the back that is 30" tall you will pull 2,925 RPM @ 70 MPH with 3.73's or 3,224 RPM with 4.11's

[N2TRUX]

Originally Posted by dbmx66

i saw this truck on here. what size you think they are?

I think they are too small, that's what size I think they are.

Like MrBeast said, you are getting way ahead of things. Get your truck back together and see where you are before you starting cutting springs and buying tires.

[dbmx66]

i plan on running much bigger tires on the rear. maybe 30 or 31 by like 12.50s maybe.

[dbmx66]

thanks n2trux, i think thats what im gonna do. just take my time and do everything right the first time. thanks for all the help, i really appreciate it.

[N2TRUX]

We know it's exciting researching while your putting it together. Just learn from our experience by doing things in the right order.

Trust me when I tell you it's a lot less work to cut your springs twice than it is to replace them because you cut too much.

[dbmx66]

yea i understand.
thanks again.

[MrBeast]

Out of curiosity, what motor are you going to be running.

And something you might want to think about is running a 4L60E it will give you overdrive, and it will seriously get you an improvement in fuel mileage.

[dbmx66]

its an all roller, 11.3:1 compression, 355 stroker.
ported heads and intake, 750 carb, scat lightweight crank
eagle rods, speed pro pistons, comp extreme energy .550 hydraulic roller cam.
full msd ignition, electric water pump and march performance belts and pulleys soon to come.

[N2TRUX]

Daaang! Whats your estimated HP/TQ

[Slammed '87]

Here is one of my trucks when i had some 15" rims and tires on it. The fronts were 225/60/15 the rears were 295/50/15. Rims were 8" wide front and 10" rear. The drop was about 5" front, 5" rear. I was happy with this combo.

[Slammed '87]

On my other truck i ran a 225/50/15 front and a 265/50/15 rear. I had a 7/12" static drop and my front a-arms were about half an inch off the ground. It wasn't the best setup, but i was low, until i bagged it. I don't miss those days.

[KQQL IT]

Originally Posted by dbmx66

its an all roller, 11.3:1 compression, 355 stroker.
ported heads and intake, 750 carb, scat lightweight crank
eagle rods, speed pro pistons, comp extreme energy .550 hydraulic roller cam.
full msd ignition, electric water pump and march performance belts and pulleys soon to come.

Id guess mileage isnt the main concern. Looks like a fun engine

[Mr Pops]

Originally Posted by dbmx66

i have 2 inch drop coils and 2.5 inch spindles, i want to go lower. would cutting the springs be bad?

thanks, david

Before I bagged my 76 Blazer, I ran a static drop for about three years with drop spindles and I cut one loop off my coils. Cutting one loop gave me about 2 1/2 inches more drop. I was running factory 15x8 chev rallies at the time with 245/60/15 tire on the front and I had about 2 3/4" inches of road clearance to my stock control arm. It was a little scary for city rut driving, but I left my factory bump stops in which prevented too much travel which would have caused the control arm to bottom out. It actually rode fine considering minimal susp travel, and I didn't have a major tire wear issue from being a little off camber.

[dbmx66]

Originally Posted by N2TRUX

Daaang! Whats your estimated HP/TQ

i dont know for sure on that but its an almost exact copy of the motor in this thing, its my dads friends race car, he helped me build my motor, lets just say alot because this car runs 8.20s on the 1/4....

[dbmx66]

hey slammed'87 both those trucks look nice. i think im gonna go with the same size tires u had in the first picture.