Very pleased with 1.6rr's
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Joined: Nov 2002
Posts: 1,831
From: Middle Tennessee
Re: Very pleased with 1.6rr's
Originally Posted by 9T4Z28
hey LT1 squirrel do u know the GMPD part # for the lt4 springs? thanks, and for the Comp pushrods wha do you guys suggest, i seen a thing taht said "Comp cams high energy pushrods for 55-UP Small block flat tappet sold in set of 16" or do i go with the "Comp cams high energy pushrods for 87-UP OE Small block roller cams sold in set of 16"? For the 1.6 rr's is Crane Cams Gold's the best? how much should this all run me. thanks guys i really appreciate the help
Dan
Dan
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Joined: Nov 2002
Posts: 1,612
From: Oklahoma
Re: Very pleased with 1.6rr's
Originally Posted by Compstall
Everyone talks about gains, but what exactly did you gain? I got 7 rwhp and 2 lbs torque on the dyno.
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Joined: Dec 2000
Posts: 2,442
From: Tacoma, WA, USA
Re: Very pleased with 1.6rr's
I don't believe in the butt-dyno, unless it's something like N20, but then you STILL don't know HOW MUCH you gained.
We can bench race power #'s all day long, the proof is on the rollers.
We can bench race power #'s all day long, the proof is on the rollers.
Thread Starter
Registered User
Joined: Nov 2002
Posts: 1,612
From: Oklahoma
Re: Very pleased with 1.6rr's
Originally Posted by Compstall
I don't believe in the butt-dyno, unless it's something like N20, but then you STILL don't know HOW MUCH you gained.
We can bench race power #'s all day long, the proof is on the rollers.
We can bench race power #'s all day long, the proof is on the rollers.
Thread Starter
Registered User
Joined: Nov 2002
Posts: 1,612
From: Oklahoma
Re: Very pleased with 1.6rr's
BTW, my local engine guy said the average gain with rr's and springs is 20-30 front end horse power. According to a %15 loss that would be anywhere from 17-25.5rwhp. Depending on mileage. He builds lt1's and ls1's all the time and owns the shop "From mild to wild" and dynos every car he builds. So i think i trust him.. 
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Joined: May 2002
Posts: 1,025
From: Saskatchewan, Canada
Re: Very pleased with 1.6rr's
Originally Posted by RE AND CHERYL
1.7RR on stock heads are a waste. The stock intake port stalls out around .500 lift and the stock exhaust around .525, also the flow increase from .400 to .500 is nothing to write home about. If your heads are stock, I would stick with 1.6RR.
I was told the stock springs are good for .500 lift (is this right?). My calculator says 1.6RR would put me around .475. Am I wrong to think that this is enough. I do realize that older springs are weaker and will float earlier because of it. This is one reason I have backed off my rev limiter to 5k until I get my heads/cam done over the winter.
I was told the stock springs are good for .500 lift (is this right?). My calculator says 1.6RR would put me around .475. Am I wrong to think that this is enough. I do realize that older springs are weaker and will float earlier because of it. This is one reason I have backed off my rev limiter to 5k until I get my heads/cam done over the winter.
1.7s are a waste? Then why do people make more power with them over 1.6s on stock heads?
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