Rocker arm question
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From: Des Moines IA
Car: 91 RS, 84 Z28, 85 Iroc-z
Engine: 3.1L, 350 4 bolt, 350 TPI
Transmission: 700R4, 700R4, 700R4
Axle/Gears: 3.23, Unknown, Unknown posi
Rocker arm question
I'm rebuilding my 350 and I had a question about rocker arms. I want roller tipped rockers like these http://www.jegs.com/p/JEGS-Performan...31437/10002/-1 but can I just bolt those in and can I have 1.6 ratio rockers with the stock cam and springs?
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From: Moorestown, NJ
Car: 88 Camaro SC
Engine: SFI'd 350
Transmission: TKO 500
Axle/Gears: 9-bolt w/ 3.23's
Re: Rocker arm question
Might be better off stepping up to the comp magnums for a little more. Theyre stronger and more consistant than the stamped steel ones. Those ones from jegs wont be much better than what you have stock.
What engine are you working with? Stock L98?
What engine are you working with? Stock L98?
Last edited by dimented24x7; Oct 9, 2011 at 10:56 PM.
Thread Starter
Member
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Joined: Apr 2010
Posts: 160
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From: Des Moines IA
Car: 91 RS, 84 Z28, 85 Iroc-z
Engine: 3.1L, 350 4 bolt, 350 TPI
Transmission: 700R4, 700R4, 700R4
Axle/Gears: 3.23, Unknown, Unknown posi
Re: Rocker arm question
Its a Goodwrench 350 crate don't know much about it. What about 1.6 ratio rockers?
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Joined: Sep 2011
Posts: 2,080
Likes: 34
From: Spring Hill, Fl.
Car: 87 iroc-z
Engine: 454
Transmission: th350
Axle/Gears: 3.73
Re: Rocker arm question
1.6 on a stock cam will be fine. if your already rebuilding the motor, id spend the money on a cam first,..if your trying to achieve more lift & duration from the 1.6s? more power for the money. on the rockers, id save for some full rollers or look for some good used ones. JMO.
Re: Rocker arm question
When I think "rebuild" I envision the engine torn down completely.
Is that your definition as well? if so, then since the cam is already out and new bearings being installed, why re-use the old cam?
If you want performance, while the heads are torn down and being worked, why re-use the stock springs?
But, if your definition of rebuild is different, please explain what is really being done and we can go from there.
Is that your definition as well? if so, then since the cam is already out and new bearings being installed, why re-use the old cam?
If you want performance, while the heads are torn down and being worked, why re-use the stock springs?
But, if your definition of rebuild is different, please explain what is really being done and we can go from there.
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iTrader: (1)
Joined: Apr 2010
Posts: 160
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From: Des Moines IA
Car: 91 RS, 84 Z28, 85 Iroc-z
Engine: 3.1L, 350 4 bolt, 350 TPI
Transmission: 700R4, 700R4, 700R4
Axle/Gears: 3.23, Unknown, Unknown posi
Re: Rocker arm question
I was planning on putting this cam in http://www.summitracing.com/parts/SUM-K1102/ would the 1.6's work with it?
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Posts: 160
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From: Des Moines IA
Car: 91 RS, 84 Z28, 85 Iroc-z
Engine: 3.1L, 350 4 bolt, 350 TPI
Transmission: 700R4, 700R4, 700R4
Axle/Gears: 3.23, Unknown, Unknown posi
Re: Rocker arm question
As far as heads, are these any good? http://desmoines.craigslist.org/pts/2629347969.html
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Thread Starter
Member
iTrader: (1)
Joined: Apr 2010
Posts: 160
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From: Des Moines IA
Car: 91 RS, 84 Z28, 85 Iroc-z
Engine: 3.1L, 350 4 bolt, 350 TPI
Transmission: 700R4, 700R4, 700R4
Axle/Gears: 3.23, Unknown, Unknown posi
Thread Starter
Member
iTrader: (1)
Joined: Apr 2010
Posts: 160
Likes: 1
From: Des Moines IA
Car: 91 RS, 84 Z28, 85 Iroc-z
Engine: 3.1L, 350 4 bolt, 350 TPI
Transmission: 700R4, 700R4, 700R4
Axle/Gears: 3.23, Unknown, Unknown posi
Re: Rocker arm question
Oh and as far as the rebuild its been bored .30 over http://www.summitracing.com/parts/SUM-SBCKIT1-300/ and this has been put in
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Joined: Sep 2011
Posts: 2,080
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From: Spring Hill, Fl.
Car: 87 iroc-z
Engine: 454
Transmission: th350
Axle/Gears: 3.73
Re: Rocker arm question
looks like a good deal on the rockers. those heads are 58cc. with your flat-tops, those 58cc heads will most likely not like pump gas. id stick with 64cc heads. that cam is barely over stock. id try the k1103 or k1104 for a mild build.
Thread Starter
Member
iTrader: (1)
Joined: Apr 2010
Posts: 160
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From: Des Moines IA
Car: 91 RS, 84 Z28, 85 Iroc-z
Engine: 3.1L, 350 4 bolt, 350 TPI
Transmission: 700R4, 700R4, 700R4
Axle/Gears: 3.23, Unknown, Unknown posi
Re: Rocker arm question
I wanna keep it streetable you could say so I was looking for a low rpm range cam. All of this will work with TPI right?
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Joined: Sep 2011
Posts: 2,080
Likes: 34
From: Spring Hill, Fl.
Car: 87 iroc-z
Engine: 454
Transmission: th350
Axle/Gears: 3.73
Re: Rocker arm question
my fault. i thought you had a carb motor for some unknown reason. duhho! tpi is touchy to changes in cams. now i see why you wanted to use 1.6s on a stock cam. most tpi motors use self-aligning rockers. changes in compression may warrant a computer/chip tune, possible larger injecters, more fuel pressure, etc. IF, you need computer/chip work, may as well see if you can get away with a little more cam.
Thread Starter
Member
iTrader: (1)
Joined: Apr 2010
Posts: 160
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From: Des Moines IA
Car: 91 RS, 84 Z28, 85 Iroc-z
Engine: 3.1L, 350 4 bolt, 350 TPI
Transmission: 700R4, 700R4, 700R4
Axle/Gears: 3.23, Unknown, Unknown posi
Re: Rocker arm question
so will those rockers work with my heads I have currently?
Thread Starter
Member
iTrader: (1)
Joined: Apr 2010
Posts: 160
Likes: 1
From: Des Moines IA
Car: 91 RS, 84 Z28, 85 Iroc-z
Engine: 3.1L, 350 4 bolt, 350 TPI
Transmission: 700R4, 700R4, 700R4
Axle/Gears: 3.23, Unknown, Unknown posi
Re: Rocker arm question
Will full roller rockers work with my heads? they're 369 casting heads
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