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Old 08-22-2010, 11:59 PM
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moving along with a 383

Well heres what ive come up with.

This is the kit i just bought
scat cast nodular steel crankshaft 3.75 stroke, Probe low expansion fully forged -12cc dish top pistons, 30 over,(4.060 bore size), PISTON WT, 507G WRIST PIN WT, 117G
Hastings molly rings, King bearings, ProStreet damper 8.00" with new mounting hardware, SFI 168 tooth flexplate,
PC 5.7 BUSHED RODS,(full floating) 5140 ALLOY, 580 GRAM WEIGHT WITH 3/8 CAP SCREWS
(balanced)

RHS pro torker heads this paycheck thursday.

edelbrock rpm airgap intake(1500-6500) Holley 750 carb

TH-350 trans. 3:73 gears

Im needing some help brainstorming for cam and stall ideas.. i was looking at a comp extreme energy hydro roller.
xr282hr 2200-5800 rpm range with .51 valve lift.
im thinking about a 2500 or so stall.
This trucks going to be a daily driver, and i need to beable to cruise on the hwy about 65-70. but im more gearing towards red light to red light power. 1/8 to 1/4 mile.

anyone have any better cam ideas? i would love to go with a lunati cam too.. the "k" kit just seems easy and cost efficient.

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Old 08-23-2010, 05:30 AM
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The RPM power range of that cam will start slightly lower with your 383. All SBC Cam rpm ranges are based on a 350. It's still a good choice tho.'
An O/D Trans would really help your crusing rpm & MPG. A TH2004R Trans is the same length as the TH350. If you're interested & need help Jakeshoe is very close to your location. >> http://www.jakesperformance.com/200-4R.html

TH2004R Tran's 4th gear = .67
2100rpm @70mph with 3.73 gear & 28" tire
2025rpm @70mph with 29" tire
TH350 Trans 3rd gear 1:1
3130rpm @70mph w/28"
3025rpm @70mph w/29"
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Old 08-23-2010, 06:57 AM
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A 4 inch bore .030 over is 4.030 inches, not 4.060. .030 over refers to the diameter increase, not how much is cut from one side of the cylinder.
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Old 08-23-2010, 08:29 AM
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Quote:
Originally Posted by Adam65
A 4 inch bore .030 over is 4.030 inches, not 4.060. .030 over refers to the diameter increase, not how much is cut from one side of the cylinder.
who said anything about .060?

and sedan do you mean a 700r4? Is it the same for the intake as well?
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Old 08-23-2010, 08:31 AM
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[QUOTE=MikeAhrado]who said anything about .060?



actually i just saw that. that was copied and pasted straight from the site that was selling the kit.!
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Old 08-23-2010, 08:35 AM
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Pick a smaller cam. That's a good street/strip cam too big for a cruiser DD though. 270 degrees or LESS.
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Old 08-23-2010, 09:36 AM
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why is it too big? Not doubting you, just wondering what i would have to deal with.
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Old 08-23-2010, 09:44 AM
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Less low end torque and worse mileage.
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Old 08-23-2010, 10:05 AM
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would this be alright or even lower than this.
rpm range 1900-5600 0.502 lift. ( its one step smaller on the comp site)
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Old 08-23-2010, 10:50 AM
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Quote:
Originally Posted by MikeAhrado
and sedan do you mean a 700r4? Is it the same for the intake as well?
No 2004R, the 700R4 is 3" longer than the TH350, would require shortening Driveshaft. The Trans Crossmember would need to be relocated or mounting pad moved for the 2004R. I'm not a fan of the 700R4.

Trans--------1st-----2nd-----3rd------4th
TH350-------2.52----1.52---1.00---------------------------------
TH200-4R----2.74---1.57----1.00-----0.67
TH700-R4----3.06---1.62----1.00-----0.70

Intake rpm operating range wouldn't change. I do agree a smaller Cam would be better to getting that Truck moving & MPG. XR270H or XR264H.
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Old 08-23-2010, 10:54 AM
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Quote:
Originally Posted by MikeAhrado
would this be alright or even lower than this.
rpm range 1900-5600 0.502 lift. ( its one step smaller on the comp site)
would what be alright?
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Old 08-23-2010, 11:55 AM
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as far as the cam goes it really depends on what you really want, you mention daily driver and 1/8-1/4 mile power in the same sentence and it's hard for the two to coexgsist. (sorry i am horrible at spelling)

here is the cam that i had in an 87' blazer that i rebuilt a 96' vortec motor into a 377 (3.75 stroke, 4.000 bore, it only needed to be honed)

http://www.summitracing.com/parts/CCA-08-502-8/

i built and drove this truck daily for 2 years, it had 35x12.5 mud tires on it, 4.10's front and back with aftermarket "posi" units. it had the same heads (rhs pro torkers) rpm intake 750 vac seconday 3310 carb, reworked stock stall, performance rebuilt 700R4 and rebuilt NP205 transfer case, 4" suspesion lift. i got about 14-15mpg out of it and it made goobs of power for what i wanted it to do.

i am an advocate for 700R4's for street use, i have had 3 so far all either local rebuilds for mild performance or the lasted in my street/strip car professionaly built, and handling a mid 11 sec car. now i will say that i'm not so much the advocate for the 700R4 at the track as i have found out the hard way that the 3.06 first gear and 4.10 rears dont go well together with 500ft lbs of torque and getting it to hook (even with good slicks) as well as the 1st to 2nd difference in gear ratio's. i am currently looking into putting a th350 in there.

i dont think that you are trying to make i ton of power so either the 700R4 or the 2004R would do you just fine but it is far easier to find the 700R4's as well as someone who know's how to build them, atleast in my area it is.
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Old 08-23-2010, 02:29 PM
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Think ive decided on this cam
http://www.lunatipower.com/Product.aspx?id=2325&gid=297

only im not if its a roller or not yet. if it isent then just a similar roller.
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Old 08-23-2010, 02:31 PM
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MY87Z-
what makes u think i dont want to make a ton of power?! lol, no your right, not a ton. but im shooting for 425 at the crank and more torque.
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Old 08-24-2010, 02:33 PM
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Quote:
Originally Posted by MikeAhrado
MY87Z-
what makes u think i dont want to make a ton of power?! lol, no your right, not a ton. but im shooting for 425 at the crank and more torque.


the first clue was the 170cc pro torker heads, with the parts you have listed it sounds like you are a little more interested in tq than hp and since this is going into a truck i would say you are on the right track with that.

with the voodoo cam that you have picked i think it will be a little more aggressive than what you are looking for, and that much ramp rate on a hyd flat tappet cam is serioulsy pushing it. the advertised duration is right about what you should be looking for but i wouldn't suggest any cam with more than about 224 and that goes for intake or exhaust side.

it really depends on how much you really plan on using this vehicle as a DD or as a fun cruiser.

the 425hp goal that you have set is very atainable but it is on the high side for the 170cc heads that you have selected, if that is really a goal of yours then i would look more into a 180-190cc head, the RHS 180cc pro action heads would be a great fit, or a set of profiler 190's.

for your application i would stay away from the voodoo cam line and also the xtreme energy cam line
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