street demon2k3

iTrader: (3)

My bro is going to trade his 96 Z28 for an 87 Monte Carlo SS with a mild 355. Here's some quick info on the car:

87 Monte Carlo SS
.030 over stock block
stock rods
stock crank
forged pistons
9.5 cr
mild cam specs unknown I'm guessing low 220's duration and .525" lift 112 LSA
Dart Iron heads(mild porting)
Dominator intake (looks like a tall single plane???)
1" intake spacer
Holley 650 4 Barrel
TH350 w/ 3K RPM stall
8.5 10-Bolt w/ 4.56 gears/posi
Gutted interior w/ race seat
drag shock/springs (rear)
traction bars

what should this car run in the 1/4 mile if it can cut some 1.7 60ft on a 27" drag radial?

Also, what kind or power should the car put down? Our plans are to go with a larger cam and let it rev with so much gear, but on the other hand we might just go a tad larger cam with some torque and use the tire/gear combo to cross right at its peak power. What do you reccomend?

Rogue86

iTrader: (14)

Sounds like first you need to find out just what is in the motor. There are a lot of different dart iron heads out there, as well as people selling those old cars who like to talk about "ported" heads when nothing is done to them.

Shawn @ VA Speed

iTrader: (3)

sounds like a pretty bad combination of parts,looks like a list of things not to put together

street demon2k3

iTrader: (3)

The owner bought the car off another guy some years back but never got around to taking it down the 1/4 mile. I asked him about the specs on the cam and he was like but he said that the DART heads are the crappy ones which are 170-180cc with minimal porting. The car sounds like it has a mild cam(not too radical), but he doesnt know the specs either. Im sure the car is a turd as it sits but it does have a good platform to start off with.

We were throwing around the idea of ripping apart the bottom end and swapping the pistons to some speed pro -5cc, zero deck the block, and trying to use some ported LT1 heads keeping the revers flow cooling some how to help with the added compression, converted Vic Jr, and large hydraulic roller. Im guessing the gears should help the car stay in its power band with a large cam.

We dont really want to go all out with this car, but it would be nice if we could get it into the mid 11's. Are there any cheaper alternatives that you guys might reccomend?

67SS&99SS

iTrader: (7)

Build a 383 or 406 for the car. If the 355 has a stock crank and rods in it, its not going to hold up over time to the abuse of drag racing. A 4.56 is a brutal gear for a mild 350. If you have a taller tire out back, you could probably get away with 4.10s, but it would really be pushing it with a 4.56. How many rpm's will the motor turn safely? 5500?

Rogue86

iTrader: (14)

Easiest way to 11's would be a vortec head set up on that shortblock with a 150 hit of spray. The rotating assembly will handle it just fine. It would be a nice, easy, cheap, pump gas motor.

Monte Pilot

Got an '86 Monte SS myself. Love these cars!

My main worry would be the 8.5" 10bolt with the tall 4.56 gears. Unless you strenthen that up a bit you might shatter the ring gear, or snap some axles - and you don't want to snap the axles on the 10-bolts...their held in with C-clips.

The other weak point that I see is the stock rods. The forged pistons are good, and the cast stock crank will be ok up to around 400 to 500hp as long as you don't over-rev it. I am assuming it is a 2-bolt main block??

Again, that is a pretty nice setup and should be good for around 350 to 400hp (approx) - enough to get that 3,700lb iron bitch into the low 14's or even high 13's. (Running a pretty similar setup to the one above and my car weighs 3,925lbs and ran 14.54s in the 1/4).

The 4.56 gears will get you out of the hole like a raped ape (assuming you can hook it), so you might even be able to get mid to low 13's!

I really want to stress though that it isn't power that kills an engine...its the rpms. The forces created by the rotating mass of the crank, rods, and piston far outweigh the forces created by the cylinder pressures - and if you want to get technical the rate of this force increase due to inertia is exponential - meaning that if you double the rpm of the engine at some point then you will quadruple the inertial forces of the rotating components!

Unless you upgrade the crank and rods to steel and forged units then keep you rpm below 5000 to 5500. This may kill you in the top end though since the rear gears are so tall...

1997bird

iTrader: (2)

That parts combo is all over the place, you might want to get a baseline & then refreshen it with a matching parts list. The 8.5" 10 bolt is pretty strong on the pinion side (same as a 12 bolt), but has a weak link with the factory axles. I found that if you get a posi for a 96' & later 8.5" 10 bolt out of a 1/2 ton truck they came with 31 spline axles. I know that Randy's Ring & Pinion has some great deals on aftermarket custom length axles too.

skidmarkSS

iTrader: (3)

383 13.2 comp. pump gas 1987 Monte SS stroker here,i am putting together a 9inch rear with dual anti roll bars,frame notch,and mini tub.Should hook like a ****.

skidmarkSS

iTrader: (3)

Our cars only weigh 3590 completely stock from the factory.WTF are you guys putting in these cars to make them weigh 3900lbs no wonder it runs 14.00

Rogue86

iTrader: (14)

How on earth are you running 13.2 compression on pump gas? Your cam specs have got to leaving a lot on the table if this is true.

street demon2k3

iTrader: (3)

Well, we're still trying to find the original owner of the car who setup the motor. the car currently has some 29" street tires, but we're gonna put on a set of 28" et drags with draglites all the way around. The car is stripped down and should be pretty light and with those 4.56's Im sure its going to 60ft pretty damn well if it hooks. I dont expect too much from the car since I dont know the full specs but I hope its not a turd.

JUICED96Z

iTrader: (2)

[QUOTE=street demon2k3;8456922]

mild cam specs unknown I'm guessing low 220's duration and .525" lift 112 LSA
Dart Iron heads(mild porting)
Dominator intake (looks like a tall single plane???)
1" intake spacer
Holley 650 4 Barrel
3K RPM stall
4.56 gears/posi

Mild cams and sinle plane intakes don't match or work well together, the single planes are for higher reving engines. Mine is a Holley Strip Dominator and its a single plane and shift my car at 7k RPM and its still making power.

Id dits the heavy heads and get some nice aluminums or port out the heads and intake. Then get a much better cam for your intake and maye like a 3800 stall.

The gears sound like to much for the car also. How tall is your rear tire?
My car is a nitrous car and has a 3.73 with a 28 inch tall tire and its perfect.
Change all that then get your carb dialed in for that and it will scream.

Don't go to big on the carb or the cam, get them to what you need, to small is better than to big.

My 468 has a BG ported BG 850 or 750 (can't remember) that flows over 1,000 CFM, killer sleeper and no carb spacer either, just the two N20 plates.

Monte Pilot

Curb weight on these cars is around 3700lbs. Weighed mine at the track a couple months ago and it dialed in @ 3,925. Its easy to break that 3900 mark with the addition of a sound system and a few other...."toys".

84MonteSS

iTrader: (2)

Whoa whoa whoa...maybe my car is made out of plastic or something. I have an 84ss...only weight reductions are a fiberglass hood and I removed the A/C. With me in it (178lbs) it weighed in at 3480. And I have checked it numerous times at different tracks. (Sorry to keep going off topic)

skidmarkSS

iTrader: (3)

Makes sense,your hood swap and A/C is worth 150 lbs depending on how far you went inside the dash and firewall.