Gen 1 SBC 406 in 1995 z28 lt1
07-25-2014, 09:29 AM
#16
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Join Date: Jul 2014
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re: Gen 1 SBC 406 in 1995 z28 lt1
Suggestions:
Type your questions in clear English. Right now, they are virtually unintelligible, which may explain why so few people are trying to answer.
Be patient. No one has an obligation to answer your questions immediately. If you can't be patient, you might want to consider another site.
As noted above, lose the attitude. You are posting on an LT1 engine forum. Why are you surprised that people choose to emphasize the benefits and potential of the LT1, rather than a somewhat antiquated carbed Gen 1 SBC? When someone did try to help you, you insulted him, because you weren't happy with his answer. Might explain why not a lot of others are trying to help you.
If you think a 364HP Gen 1 SBC is more powerful than an LT1 or an LS1, you simply don't know what you are talking about. Numerous people on this site have 500 (flywheel) HP stock displacement, stock bottom end LT1's. Get the stock LT1 heads ported by someone who knows the LT1, and you have a damn good engine, at very low cost. LS1's can support 600HP without breaking a sweat.
Why are you asking about an "underdrive pulley"? With all that Gen 1 SBC HP, and torque, why do you want to run an U/D pulley? One problem with using even the stock LT1 pulley would be that the typical Gen 1 SBC has a damper with an external balance weight on it, and the LT1 pulley, which is integrated with the harmonic damper, is neutral balanced. You would have to check to see how Karl balances their engines.
And to answer the question you asked in the other post you made, no, you cannot use an LT1 water pump on a Gen 1 SBC. While 90% of the Gen 2 LT1 is identical to the Gen 1 block, the front of the block is totally different, with a unique "reverse flow" cooling system, and a front distributor mount. The LT1 water pump is also driven off the cam timing sprocket.... no way to make that work on a Gen 1 SBC.
Type your questions in clear English. Right now, they are virtually unintelligible, which may explain why so few people are trying to answer.
Be patient. No one has an obligation to answer your questions immediately. If you can't be patient, you might want to consider another site.
As noted above, lose the attitude. You are posting on an LT1 engine forum. Why are you surprised that people choose to emphasize the benefits and potential of the LT1, rather than a somewhat antiquated carbed Gen 1 SBC? When someone did try to help you, you insulted him, because you weren't happy with his answer. Might explain why not a lot of others are trying to help you.
If you think a 364HP Gen 1 SBC is more powerful than an LT1 or an LS1, you simply don't know what you are talking about. Numerous people on this site have 500 (flywheel) HP stock displacement, stock bottom end LT1's. Get the stock LT1 heads ported by someone who knows the LT1, and you have a damn good engine, at very low cost. LS1's can support 600HP without breaking a sweat.
Why are you asking about an "underdrive pulley"? With all that Gen 1 SBC HP, and torque, why do you want to run an U/D pulley? One problem with using even the stock LT1 pulley would be that the typical Gen 1 SBC has a damper with an external balance weight on it, and the LT1 pulley, which is integrated with the harmonic damper, is neutral balanced. You would have to check to see how Karl balances their engines.
And to answer the question you asked in the other post you made, no, you cannot use an LT1 water pump on a Gen 1 SBC. While 90% of the Gen 2 LT1 is identical to the Gen 1 block, the front of the block is totally different, with a unique "reverse flow" cooling system, and a front distributor mount. The LT1 water pump is also driven off the cam timing sprocket.... no way to make that work on a Gen 1 SBC.
07-25-2014, 10:40 AM
#17
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Join Date: Jul 2002
Location: Kissimmee, Fl, USA
Posts: 1,942
re: Gen 1 SBC 406 in 1995 z28 lt1
OK, I'm confused, I'll admit it. It must be my serious lack of intelligence.
Anyway, if the block is an LT block, then the serpentine system you have on your existing engine will just bolt right on to this one. For pulleys there is one on the damper, one for the power steering system, one for the air conditioning compressor and one for the alternator. The water pump is driven off the cam so there is no pulley for that. The A.I.R. pump is electrically driven and doesn't have a pulley either.
Be advised:
1) underdrive pulley sets lower the alternators ability to charge the battery at idle...you may see flickering lights and a voltmeter reading in the yellow zone.
2) You can eliminate the A/C compressor with a kit that has a pulley on a bolt on plate. I think you might need a different belt with this kit.
3) If the water pump you're looking at has a pulley, it's the wrong one for an LT1
What else do you need to know?
Anyway, if the block is an LT block, then the serpentine system you have on your existing engine will just bolt right on to this one. For pulleys there is one on the damper, one for the power steering system, one for the air conditioning compressor and one for the alternator. The water pump is driven off the cam so there is no pulley for that. The A.I.R. pump is electrically driven and doesn't have a pulley either.
Be advised:
1) underdrive pulley sets lower the alternators ability to charge the battery at idle...you may see flickering lights and a voltmeter reading in the yellow zone.
2) You can eliminate the A/C compressor with a kit that has a pulley on a bolt on plate. I think you might need a different belt with this kit.
3) If the water pump you're looking at has a pulley, it's the wrong one for an LT1
What else do you need to know?
07-25-2014, 10:59 AM
#18
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Join Date: Dec 1969
Location: Little Rock, AR
Posts: 27,709
re: Gen 1 SBC 406 in 1995 z28 lt1
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07-25-2014, 12:16 PM
#19
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Join Date: Nov 1998
Location: Hell was full so they sent me to NJ
Posts: 70,651
re: Gen 1 SBC 406 in 1995 z28 lt1
This thread is pointless. It's obvious he desn't want help, because every time we give him the correct answer, he tells us his people tell him we are wrong.
So, after insulting at least 3 of us, and demonstrating that he already knows the answers to all his questions, there is no real reason for him to be here
The end.
So, after insulting at least 3 of us, and demonstrating that he already knows the answers to all his questions, there is no real reason for him to be here
The end.
07-26-2014, 08:53 AM
#20
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Join Date: Nov 1998
Location: Hell was full so they sent me to NJ
Posts: 70,651
re: Gen 1 SBC 406 in 1995 z28 lt1
He was trying to bolt parts from his LT1 onto a Gen 1 SBC.
This appears to be the short block he was talking about:
http://www.karlperformance.com/p/C40...-5-7-Rod/60989
For anyone who reads this thread, and somehow comes to the conclusion that the OP had any idea what he was talking about, I can assure with absolute, total certainty, that an LT1 water pump will not work on a Gen 1 SBC block:
This appears to be the short block he was talking about:
http://www.karlperformance.com/p/C40...-5-7-Rod/60989
For anyone who reads this thread, and somehow comes to the conclusion that the OP had any idea what he was talking about, I can assure with absolute, total certainty, that an LT1 water pump will not work on a Gen 1 SBC block:
Last edited by Injuneer; 07-26-2014 at 08:58 AM.
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