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View Poll Results: Intake Poll
Stock LS1
2.70%
LS6
70.27%
Fast 78mm
5.41%
Fast 90mm
21.62%
Voters: 37. You may not vote on this poll

Intake Opinions needed on stock motor

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Old 02-25-2007, 07:46 AM
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Default Intake Opinions needed on stock motor

Hey guys,
I have a 98 LS1 Motor, that I am doing a swap into my LT1 car. Speartech is doing the harness, etc...to make it a plug-n-play deal...

Obviously from what I read, and hear the 98 is the Bastard child of the LS motors...

Right now the motor is just gonna be bolt-on's with a tune headers, and exhaust. Possibly a nitrous kit....

So please help me out, and let me know what you all think would work, if the 90 will work reasonably well, I would like to go with that due to having an extra LS1 block that I will be building a bigger motor for next winter...

Another thing, only keep positive responses too, let's not turn it into a flaming match....
Old 02-25-2007, 11:32 AM
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12 views, and no-one chiming in?
Old 02-25-2007, 02:14 PM
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no no no no no no no no no do not put a 90mm intake on with stock heads/cam..strap on an LS6 and youll be happy
Old 02-25-2007, 02:59 PM
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Just an ls6 will work fine and dandy.
Old 02-25-2007, 03:47 PM
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LS6 is what I was thinking, just wanted to see if it would totally kill the driveability of it if I put a 90mm on it, is the FAST 78 even much more than the LS6?
Old 02-25-2007, 06:14 PM
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The 90 won't hurt anything on a stock motor, it just won't show a worthwhile improvement over the LS6 for the money invested in it.
Old 02-25-2007, 06:23 PM
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Get the professional products intake for some extra bling!
Old 02-25-2007, 08:15 PM
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The 90 will make your low/mid range soggier.

The 78 FAST is freaking expensive!

The factory LS6 is plentiful and it's a great intake.
Old 02-25-2007, 08:47 PM
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LS6 and a ported t/b, good match-up
Old 02-25-2007, 08:49 PM
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'98 is not so bad, smaller cam gear in t/b allows a faster WOT response, '98-'99 had a smaller cam gear in t/b
Old 02-25-2007, 10:58 PM
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i used the weiand its very nice for the money and basicly a metal ls6 it has a removable plate for porting ther was a noticeable differnce in power over the stock unit.
Old 02-26-2007, 12:27 AM
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im still on a stock 99 with the plug on it. works great and im over 500rwhp

but i chose LS6 FTW, somewhat cheap and beneficial
Old 03-01-2007, 12:00 AM
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so for the people that voted FAST 90.. PLEASE explain your reasoning
Old 03-01-2007, 12:56 PM
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ls6 is good enough for a bolton car. That and a ported stock tb and you will be all set.
Old 03-01-2007, 05:26 PM
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Originally Posted by sidewayz28
so for the people that voted FAST 90.. PLEASE explain your reasoning
Why not? He said he doesn't mind spending the money on it and he'll be putting another motor together next year that's going to take advantage of it. I would usually suggest buying heads before a FAST90, but if he's going to build a boost motor or something next year, then the heads he buys this year won't work well next year, whereas the FAST will.

It'll still give him a benefit over the LS1, and maybe slightly better than an LS6 on stock stuff. When he builds that nice new motor next year, this is one less expense he needs to put out then.
Old 03-01-2007, 08:14 PM
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Originally Posted by DuronClocker
Why not? He said he doesn't mind spending the money on it and he'll be putting another motor together next year that's going to take advantage of it. I would usually suggest buying heads before a FAST90, but if he's going to build a boost motor or something next year, then the heads he buys this year won't work well next year, whereas the FAST will.

It'll still give him a benefit over the LS1, and maybe slightly better than an LS6 on stock stuff. When he builds that nice new motor next year, this is one less expense he needs to put out then.

Exactly what I am thinking...just wanting to make sure it's not gonna dog the motor...
Old 03-02-2007, 12:01 AM
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Originally Posted by DuronClocker
Why not? He said he doesn't mind spending the money on it and he'll be putting another motor together next year that's going to take advantage of it. I would usually suggest buying heads before a FAST90, but if he's going to build a boost motor or something next year, then the heads he buys this year won't work well next year, whereas the FAST will.

It'll still give him a benefit over the LS1, and maybe slightly better than an LS6 on stock stuff. When he builds that nice new motor next year, this is one less expense he needs to put out then.
you have to be careful when installing the FAST..... they come with special bolts that are longer than the factory manifold bolts. i didnt use their bolts and on the 1st run with boost, opened up the FAST on one side. but still managed to make 472/501

goodluck my friend. BOOOST is very fun

Old 03-02-2007, 02:05 AM
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I hear the rod bolts in pre 2000 or 2001 cars are weak? You can always get a set of forged pistons and eagle rods since you have that motor out already
Old 03-02-2007, 05:31 PM
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I voted LS6 the Fast intakes are nice but just a bit pricey!
Old 03-02-2007, 06:44 PM
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Originally Posted by 02silvaZ
LS6 and a ported t/b, good match-up

Just did this to my 99... Works great! And if you do change your setup later you can always sell your LS6 intake to someone on here



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