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  #106 (permalink)  
Old 12-27-2012, 09:05 PM
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Originally Posted by F-BIRD'88 View Post
There is no reason you cannot get many summers out of this motor.
You have to get real, real agressive on boost (blower drive ratio) (and tune it wrong) to get into trouble.
Most people settle on about a 2:1 drive ratio for this blower, on the street on 92 octane, 8.5:1 with some retard and enjoy years and years of trouble free supercharged power All on a stock short block.

like I said I'd rather see you spend the money to get the spark retard box than forged pistons, etc etc.
(reasonable, streetable boost)
And I suspect the torque at even 5-7 psi is going to make me happy enough to not get greedy anytime soon....so....in theory, a new hei, the msd timing retard from eBay, port the heads, reinstall with arp head bolts, learn how to boost reference my 750, install my converter, buy and install gear and drive it.....if it breaks, then fix it....

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  #107 (permalink)  
Old 12-27-2012, 09:09 PM
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A Whipple supercharger is a more efficient supercharger but is double the cost to manufacture and buy.
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  #108 (permalink)  
Old 12-27-2012, 09:13 PM
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Originally Posted by F-BIRD'88 View Post
A Whipple supercharger is a more efficient supercharger but is double the cost to manufacture and buy.
Yah....that's not gonna happen, what's the diff between a 144 and 177? Price wise they seem almost the same?
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  #109 (permalink)  
Old 12-27-2012, 09:15 PM
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Originally Posted by bygddy View Post
And I suspect the torque at even 5-7 psi is going to make me happy enough to not get greedy anytime soon....so....in theory, a new hei, the msd timing retard from eBay, port the heads, reinstall with arp head bolts, learn how to boost reference my 750, install my converter, buy and install gear and drive it.....if it breaks, then fix it....
Yup,,,, more than happy. Just remember, when you get temped to try the higher boost pulley set (2.33:1), with too much timing for pump gas... and you will, : Run it on 110 octane gas. Or pre order and new set of pistons LOL.
The 110 octane fuel swap is less work

If you are going to wimp out and not get the crane F278-2 cam and the cam that is in it is totally unsuitable as a blower cam, get the Summit K1105 cam set.
It works great for $99 in a blower motor.
Start with the 1.71:1 and 1.95:1 drive ratios. (6" bottom pulley 3.5" and 3.07" top pulleys) And the spark retard box. I bet you never will need to go beyond that.

Last edited by F-BIRD'88; 12-27-2012 at 09:22 PM.
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  #110 (permalink)  
Old 12-27-2012, 09:21 PM
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Originally Posted by F-BIRD'88 View Post
Yup,,,, more than happy. Just remember, when you get temped to try the higher boost pulley set (2.33:1), and you will, run it on 110 octane gas. Or pre order and new set of pistons LOL.

If you are going to wimp out and not get the crane F278-2 cam and the cam that is in it is totally unsuitable as a blower cam, get the Summit K1105 cam set.
It works great for $99 in a blower motor.
Lol....have to see how hard an "in car" cam swap is going to be....and go from there.....
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  #111 (permalink)  
Old 12-27-2012, 09:27 PM
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Yah....that's not gonna happen, what's the diff between a 144 and 177? Price wise they seem almost the same?
The 144 is two inches shorter..... The 177 makes a whole lot more power at high boost. The 177 is capable is way over 600hp on a 350.

IMHO the 10 rib belt system on the 177 is a lot better.

Its is optional on a 142. costs extra.

If all you will ever want is 450hp and need a low profile the 142 is good.

If you want power, buy the 177 hands down.

Use a slightly cooler than stock non projected tip spark plug in your 920 heads . Like a Champion RV8C.
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  #112 (permalink)  
Old 12-27-2012, 09:29 PM
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Any blown 177 applications for 87 octane with decent output numbers on a 350 or 383??.
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  #113 (permalink)  
Old 12-27-2012, 09:45 PM
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Any blown 177 applications for 87 octane with decent output numbers on a 350 or 383??.
87 octane fuel is not suitable for a supercharged motor or any high performance. .
You are guarantied to end up with a bunch of broken parts sooner or latter.
87 octane gas is for commuting back and forth to work on a stock Grocery getter.

Don;t even think about it.
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  #114 (permalink)  
Old 12-27-2012, 09:46 PM
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At what point are you when you need to buy blower pistons with a lower top ring??.
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  #115 (permalink)  
Old 12-27-2012, 09:49 PM
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We have seen and built some 87 N/A 9.0 SCR/8.5 DCR performance engines.I just thought there might be a version of that for a blower engine.
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  #116 (permalink)  
Old 12-27-2012, 09:50 PM
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At what point are you when you need to buy blower pistons with a lower top ring??.
When you think you can use 87 octane gas.

Get diesel motor pistons. LOL
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  #117 (permalink)  
Old 12-27-2012, 09:58 PM
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Whats the fixation on ARP head bolts?
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  #118 (permalink)  
Old 12-27-2012, 10:14 PM
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The top ring question was/is a honest question.There are piston manufactures that build blower pistons with a lower top ring land to avoid heat.I just don't know when that is needed.Not a blower guy.
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  #119 (permalink)  
Old 12-27-2012, 10:34 PM
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The top ring question was/is a honest question.There are piston manufactures that build blower pistons with a lower top ring land to avoid heat.I just don't know when that is needed.Not a blower guy.
They are needed when you are pushing the envelope to the limit. ( but not over the limit.

They fail just the same, when ever you exceed the laws of physics.
detonation is the result and the detonation and resulting piston insult is amplified
in a supercharged engine, reguardless of the piston design.
A Blower piston is just stonger, will take it for a bit longer, (you hope).
If you don't fix the detonation the blower piston fails or burns up just the same.

When that happens, the repair bill is larger.

Like when running 87 octane gas in a supercharged engine or a high compression ratio engine.

If you want to exceed the laws of physics you best have a pot full of money.

This is not about exceeding the laws of physics. Its about going real fast for
reasonable cost, for a long time and having fun,, while staying well within the laws of physics. Cheap low octane fuel is not cheap.
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  #120 (permalink)  
Old 12-27-2012, 11:03 PM
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Originally Posted by F-BIRD'88 View Post
Whats the fixation on ARP head bolts?
Honestly? No idea.....just what I have always been told to use for ultimate strength....
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