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Induction Upgrade Questions

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Old Dec 2, 2004 | 04:51 AM
  #1  
Magman's Avatar
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From: Oak Harbor, WA
Car: 1990 IROC-Z
Engine: 383 HSR
Transmission: 700R4
Axle/Gears: 3.70
Induction Upgrade Questions

Fellas, I'm on my return trip from Iraq and am ready to lay down some cash for the remaining induction upgrade goodies I will be installing on my 1990 L-98. I already have and will be installing my AFR 190 heads with CC 1.6 Roller Rockers and a Holley Stealth Ram. I also have a brand new LT4 Hot cam but have decided to switch to the LPE219.
The questions I have are:
1. Where can I get the LPE 219 cam at a decent price?
2. Are the stock roller lifters ok to re-use or is that too much of a gamble with 140,000 miles on them?
3. Will the 219 cam work well with the 1.6 RR's?
4. I am also going to order a Vigilante converter and considering a stall of about 2800, any advice?

All of this will be installed on an otherwise stock 350 with 140,000 on the clock. The shortblock is sound so I am holding off on the 383 upgrade for now. My intention is to build a bad *** street motor capable of 12-13's at the track. thanks in advance for your inputs.
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Old Dec 3, 2004 | 05:29 AM
  #2  
CashMunson's Avatar
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From: Ravenna, Ohio
Car: 87 Trans Am GTA
Engine: 408 LS
Transmission: LS 4L60E
Axle/Gears: 9 Bolt/3.70 Gears/TAP Girdle
www.stealthram.com
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Old Dec 3, 2004 | 06:15 PM
  #3  
Vader's Avatar
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Just a couple things:

1. Thanks for being there, and we're glad you're returning. Although you may not hear/read it enough, the great majority of us appreciate your efforts in the middle east. Even most those that openly disagree with the policy of having a presence in Iraq are at least intelligent enough to recognize that you are/were there as a result of duty and orders, and are doing the best you can to fulfill those orders. The rest of us already know that you've made us proud.

2. Are you planning on keeping the TPI, or changing to an induction system that will breathe better at RPMs above 4,500? That would significantly affect your cam selection.
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Old Dec 3, 2004 | 06:19 PM
  #4  
Vader's Avatar
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OOPS! I missed the part about the "Holley Stealth Ram". OH: That and the higher stall converter should be a good compliment to the cam and heads.

Sorry, I don't know where to get any bargains.
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Old Dec 3, 2004 | 06:20 PM
  #5  
AJ_92RS's Avatar
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Joined: Apr 2001
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From: USA
Car: yy wife, crazy.
Engine: 350, Vortecs, 650DP
Transmission: TH-350
Axle/Gears: 8.5", 3.42
Induction sucks.
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Old Dec 3, 2004 | 09:09 PM
  #6  
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From: Tigard, Oregon
Car: '86 Berlinetta
Engine: 350
Transmission: 700R4
I say become the first person on TGO to use Direct Fuel Injection like in diesels :hail:
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Old Dec 24, 2004 | 11:24 PM
  #7  
Magman's Avatar
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From: Oak Harbor, WA
Car: 1990 IROC-Z
Engine: 383 HSR
Transmission: 700R4
Axle/Gears: 3.70
Update to topic.

I have decided to lay the bucks down and go for the 383.
Heres what I have for the combo:
HSR, AFR 190's (65cc), 2800 Stall Vigilante, LT4 Hot Cam, SVO 24 lb injectors. I'm looking at purchasing a balanced Eagle rotating assembly with SRP pistons after I have the block machined. I'll work with the shop to get in the 10-10.5 comp ratio. Rear gears are stock and vehicle weight will be slightly lower than stock (fibergalss hood, Al water pump, Al heads). I have no emissions to worry about and this is my second vehicle (hobby). Right now I feel as though I have several parts mismatched for my 383 (24 lb'ers and LT4HC) This is not a daily driver and I would like to see low to mid 12's when I do take it to the track.

Any input on the cam and injectors? I really want to do it right the first time but am reluctant to buy another cam and injectors. By the way, motor is now a shortblock waiting to be pulled, delayed at least a day for Christmas. Thanks!
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Old Dec 25, 2004 | 12:21 PM
  #8  
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Mag,

I hope you're not married to that camshaft. Having recammed an LT1 or so more than once, the LT4 "Hot" is barely adequate for a smaller-inch LT4, and relies on higher ratio rockers for its numbers. In a better flowing 383, it will be nothing more than a disappointment. It is certainly an improvement over the stock grind, but definitely not the final answer in cam profiles.

I initaially installed a slightly better than LT4 "Hot" spec Comp cam, then removed and replaced it with an even more aggressive spec cam to increase my satisfaction. This is in an LT1 with 195/70-ish 53cc heads, bigger than LT4 valves, and in a 4,500 pound land barge. Even at that, my vehicle is a daily driver in the summer months, idles very smoothly and quietly with plenty of vacuum, and lost very little in low end torque. What loss was sacrificed at the low end was more than compensated for at upper RPMs, and a hunger for RPMs that is almost insatiable. The torque just keeps coming on all the way to about 5,500 RPM. I have a serious wheelspin problem even with the 255-17 rubber, so the diminished torque at low end is not a hindrance. In a lighter car, the "loss" would be even more tollerable, unless you enjoy making copious amounts of rubber smoke, tread chunks and bits, and friction induced tire fires.

The HSR induction is strikingly similar to the ported LT1 intake I'm using, so your results should be similar. Your longer stroke is going to appreciate more cam lift and moderate duration even more than my puny 350. A long stroke/longer rod 383 is likely going to be happier with lots of flow between sharper ramps to help trap the cylinder charge quickly. You'll definitely want to be looking at a roller setup and stout valve train for the higher pressure springs demanded by that type of use.

Quite frankly, over a 377 or 383, even 210 heads would be a good choice. If you already have the 195s, that's not a bad selection either, but it might favor the lower RPM ranges a bit compared to the larger port heads. Either way, it isn't going to be any slouch.
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Old Dec 25, 2004 | 01:19 PM
  #9  
White91GTA's Avatar
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From: Oklahoma
Car: 1991 Trans AM GTA
Engine: 5.7L TPI
Transmission: 700R4
First of all...we are all glad that you made it home safe I have been lucky so far and have not been sent over there.

Now...for the motor. Going with the HSR and those heads, you might consider looking into a cam with somewhere around 224/230 duration @ 0.050". I will be doing pretty much the same thing that you are doing, except that I am going with a set of AFR 210cc heads w/ 64cc chambers and a Comp XR288HR cam (236/242 @ 0.050" .520/.540, 110). That lift is with 1.5 RR's, which I will be using 1.6 RR's.
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Old Dec 25, 2004 | 01:32 PM
  #10  
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Joined: Jan 2003
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From: st. Petersburg, Fla
Car: 83 Z28
Engine: vortec 305 for now
Transmission: 5 speed
I have no idea what to recomend for the car since I'm a carb guy, but I read the post and want to say thanks, and I'm glad you're home safe. Not all of us buy the crap from the mainstream media.
Good luck on the car.
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Old Dec 25, 2004 | 01:56 PM
  #11  
Magman's Avatar
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From: Oak Harbor, WA
Car: 1990 IROC-Z
Engine: 383 HSR
Transmission: 700R4
Axle/Gears: 3.70
Thanks for the replies and yes, I am glad to be back to the good ole USA! The heat index was killer in the Arabian Gulf from JUL-SEP. Mostly 130 but it reached 160 deg once or twice (im freezing now!!) Thanks for the advice, you guys have confirmed my thoughts of calling Comp Cams. I guess now I have some parts to sell! Later, back to search mode...
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