troyb86

Hi im new here and have a few qestion.
I have a 350sbc and i just installed a 442/444 cam, edelbrock EPS manifold, edelbrock 750cfm carb, double timing chain, MSD disc. MSD wires 8.5mm, msd coil, accel spark plugs, hooker headers, #993 76cc heads, cast #3970010, # F0619CK1.
How much HP/TQ will I be looking at?

How fast would a 4300lbs truck with that motor and 4.22 gears, posi, and TH400 tranny with shift kit be in 1/4?
thanks alot!
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heres a small video of my motor.......
http://videos.streetfire.net/video/d...7a001ba197.htm

Fast355

iTrader: (2)

Lets see, crap heads, probably dished pistons, no compression, mild cam, un-tuned over carbed combo, too much gear, and a power sucking TH400.

Low 17s to High 16s @ 85 MPH is my guess

troyb86

http://videos.streetfire.net/video/d...7a001ba197.htm

Mkos1980

iTrader: (8)

Ditto. I'm accually going to say High 17's

troyb86

well (fast) this truck im putting this motor in had a ford 4.0 sohc V6 205 hp and 240TQ and it ran a 15.98 in 1/4 so i dout it will be that slow.
but thanks for you input.
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it has 9.1 compression. and the motor was rebuilt.

Fast355

iTrader: (2)

I got to thinking about this AND I actually ran against a similar combo in a 1984 3/4 ton Chevy truck (about 4,600# empty). My coworker had a 350, performer RPM intake, 780 holley, stock 84 heads (casting #?), comp high energy 268?, headers, duals, TH 400 and 4.10s. All I heard about, all day long was how bad this truck was with its 350 and how puny my 305 was.

I had a 1983 G20 Van, 245 RWHP 10:1 305, (350 camshaft, 1.6:1 rockers, ported 601 heads, RPM intake, BBC TBI unit, headers, duals, X-pipe, custom prom tuning), 2,000 rpm stall in my 700r4, GM 14 bolt rear with 3.73s and Eaton posi.

Here is what Happened, I am looking at the timeslip right now.

(Car)-----TRUCK------VAN

R/T-------.697--------.380
60'--------2.683-------2.572
330'-------7.426-------7.174
MPH-------46.29-------51.77
1/8--------11.49-------10.815
MPH-------59.58-------66.79

troyb86

this motor is going in a 01 ford explorer sport trac, weights 4300lbs with 200lbs driver and 1/2 tank of gas.

Fast355

iTrader: (2)

Honestly though, how did you figure 9:1 compression. Is that what the piston said on it, or did you measure everything and calculate the result. What is the dynamic compression ratio with that camshaft. What do the 993 heads flow, last time I checked they were on the bottem of the chart flow wise. 750 is a big chunk of carb to calibrate properly.

The video of you free-reving your engine is kinda pointless unless you want to show un-loaded throttle respons. My 3.1 nothing goes from 1,800 rpm-5,600 rpm in about 1/2 second as well.

troyb86

The hotrod shop that built that motor measured the compression and said it was 9:1. they also said they expect it to have about 310hp and 350tq at flywheel. the 993 heads are aftermarket 76cc heads from goodwrench.
They also expect the truck to be in the high 14s to low 15sec 1/4.
soooo? i cant wait to see whos right!
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on that video it was going from 800rpm to 8200 rpm.

Fast355

iTrader: (2)

8,200 RPM too much will = BOOM

The 993s are just the regular old GM delivery van castings. Nothing special to them, they come on thousands of GM goodwrench engines. Chevy High Performance did a dyno test series on the goodwrench 350 abou 8 years ago. They had to port the heads, back cut the valves, mill the heads, use a thinner head gasket, and add a small cam to get 280 HP.

troyb86

we got the motor out of a 89 chevy pu and without those mods it ran really good with the old cast iron manifold stock cam, Q-junk carb. it would beat my bros lincoln mark VIII from 0-40mph. those are low 7 sec 0-60 cars.
and yeah i know that the 89 came with TBI.
so what i dont understand is why the pro hotord guys are saying 300+ HP and you guy are saying around ? so if my truck is going to be a mid high 17sec truck in 1/4 then what is a stock chevy truck mid high 18? Then a camaro should be in the mid 16 at best cause there not light themselfs. iv had 2 camaros, a 89 TPI and a 98 WS6 T-56. why would the truck be alot faster with the 4.0 V6? i had a 15.98 1/4 thats with 205hp. I know this 350 will put out more thin that!

troyb86

the heads are from 98 , we put a 600cfm carb on there first and it ran sluggish, we switch it to the 750 and wow what a diff.
we dyno tomorrow!.
lets see who's right

Fast355

iTrader: (2)

I said low 17 high 16. A Chevy truck with a 350 TBI IS a 17 second truck in most cases. You ARE going to run out of power long before you get to the end of the track with no OD and 4.22 gears. By the time I was hitting the end of the 1/4 with 3.73s I was needing to shift (around 100 MPH).

Actually a F-car is about 3,200-3,600 lbs depending on options, etc. Then you have the aerodynamics of a brick with that sport trac. The TH400 is going to rob roughly 25% of your engines power going back to the wheels. That turns your 310 HP engine into about 230 RWHP. A stock L98 puts out about 205-210 RWHP. A stock 350 Vortec puts out about 205 RWHP and makes 255 FWHP, it will run 15.9s in the 1/4 in a Regular Cab, Short Bed C1500 weighing about 4,300 lbs. A Caprice makes about the same power and runs roughly 15.4s or so. The difference there is aerodynamics and overall gearing.

In the end I think it is going to go down to poor gearing, too tall a first gear in a transmission that sucks too much power, and an engine that lacks top end HP. I am willing to bet that your 350 with its "422/444 RV cam" and stock Goodwrench castings will be done by 4,500 where the 4.0 would turn well over 5,000 rpm(I want to say 5,500 rpm for peak HP). Peak torque is going to be around 2,500 rpm for the Chevy and 4,000 rpm for the ford. IIRC, the Sport Tracs have a 5 speed automatic as well with much less loss than the TH400.

Sonix

iTrader: (1)

That's going to be a dog. That's a stock '77 350 motor essentially, those are rated from GM at a scalding 185HP or so. That's a bit bigger of a cam, and a slightly better spark - Call it 200HP.

Wow.
You're putting a 30 year old technology gas guzzling 350 chev V8, into an almost new ford mini truck. I'm struggling to grasp any kind of logic here.

Don't get me wrong, I love my gas guzzling V8 - in my light sports car. A big vehicle needs big cubes, or the driver needs to thoroughly enjoy going slowly.

I applaud your fab skills in shoehorning a chev 350 into a newer ford truck. Kinda odd, but noteworthy.

And yea, here at www.THIRDGEN.ORG we generally tend to care more for... threads involving THIRDGEN camaros and firebirds. I'm having a tough time caring about this truck.
Aside from my burning desire to see the dyno results, that is interesting to see.

troyb86

I see what your saying.... but The aerodynamics are much better then a chevy 1500 witch weights alot more. but answer me this why would it run 15.98 with those same gears same weight same aerodynamics but less hp? less TQ? the Th350 takes 6hp to run the 700r4 takes 5hp to run and the th400 takes 9hp to run so? not much diff. with the gearing and the trans it would be at 4600rpm at 100mph. so that right about were the peak HP is.

cragar

Hey man i think that truck will pull a low 16 or a high 15. a th400 or th350 trany will drop your hp by about 30 horse not 25%. a overdrive tranny will drop it about 50 horse, and a powerglide will drop it about 15 hourse. and ya 8000 rpm would be no good. You will be reved about 6500-6600 rpm at the end or the track. it wont pick up as quick as you think in 1st but your 2nd gear is gona be your pick up gear. and that 750 is almost overkill. A stock chevy is about 18 secounds and a stock camaro with a 305 runs a high 16. also alot of v6's have higher compression and lower gears so that they can gain in power.

troyb86

the R55E tranny in the sport trac took 14hp to run. it would peak out at 5000rpm then bogdown.
And im sorry Sonix that i weasted you time. But i really dont have very many other forums to go to. I have a ford with a chevy motor. so i came here with the thought i maybe could get some info?
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Thanks cragar.
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I dyno at 9am tomorrow so i'll let you guys know!
Thanks for all the replys

Fast355

iTrader: (2)

The Sport Trac is NOT that much more aerodynamic than a C1500. It actually weighs very close to a single cab short bed C1500. The TH400 will suck ALOT more than 9 HP. Then you have alot of heavy parts that have to change direction each time it shifts. The heavier the parts, the slower the shift, and the slower the car. You also have to factor converter slip into the RPM equation. You will be a couple hundred RPM over peak HP, IF you trap at 100 mph.

I do know that 325 RWHP (10.5:1 TBI 355, Dart Iron Eagle 180s, LT4 cam, Headers, 2 1/2" duals) will pull 5,600 lbs of G20 Van with 3.73s and a 4L60E to these times (shifting at 6,500 with peak HP @ 6,300. Also had 300 RWTQ from 2,500 RPM up).

60' = 1.90
330' = 5.88 @ 57.68
660' = 9.19 @ 74.99
1000' = 12.17 @ 85.37
1320' = 14.52 @ 91.93

Transmissions do not operate on fixed losses. They are parasitic losses and exponential. The higher you rev the unit, the more power you will lose. A 700r4 has about the same losses as a TH350.

troyb86

if i trap at 100mph id be a happy man. but i know i wont get close. The vortec 350 in a small c1500 could get in the mid 15 1/4 with a few little things. so why cant i ?
ok see you'll tomorrow with the #'s

Fast355

iTrader: (2)

Well, DO let me know what it does on the dyno. If you run it at the track post up the time slips as well.

Supervisor42

Well, atleast we won't be hearing: "it woulda been really fast if it weren't for all the wheelspin"
Post that video & timeslip and hand us a cup of shutup juice before happens.

troyb86

wheel spin hahahahahahahahaha, I have 14.5 wide tires on there.

Ok heres how it went.

Frist run, open headers no air cleaner, 287 RWHP @ 5200 347Tq at 2800rpm.

run 2. purple horny mufflers, K&N, 282 RWHP @ 4900rpm 353TQ at 2500rpm.

So Im really happy! Alot better then I expected. Im port and polishing in 2 weeks! so cant wait to see the results

Thanks for all the replys!

SpitotRs305

i dont know what kinda shop let you do a dyno run with open headers but no one around me allows that and i mean no one.... but i will point you Here

https://www.thirdgen.org/forums/tech...light=dyno+run


this is the same tranny the same block and it has been bored .030 over and it isnt seeing that kinda power...then again this motor was dynod extremly rich... those numbers sound fishy show us the graph!!!

Supervisor42

Clearly, you've never been to Alabama!
Here's mine with open headers: Give it time to load and turn up the volume.
Just something about a high rpm smallblock that makes living with that nasty idle and weak power brakes all worth while....