Horsepower estimate
Thread Starter
Instructor
Joined: Apr 2008
Posts: 154
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From: Parkville Missouri
Horsepower estimate
I have a 92 LT1 that I have just started doing things to. I am estimating the horsepower to be between 320 and 330 at the crank. What do you think? and also what do you think would be at the wheels?
thanks
92 LT1
K&N filter and cut lid
throttle body bypass
Magnaflow mufflers
1.6 roller rockers and lt4 springs
(i know these are NOT major improvements but i feel every lil bit counts)
thanks
92 LT1
K&N filter and cut lid
throttle body bypass
Magnaflow mufflers
1.6 roller rockers and lt4 springs
(i know these are NOT major improvements but i feel every lil bit counts)
Last edited by matt_jahn; Apr 28, 2008 at 12:03 AM.
Race Director
Joined: Aug 2000
Posts: 14,130
Likes: 7
Cruise-In II Veteran
Those mods may warrant 10-15 HP if youre lucky.Thats a big IF.
Without changing the cam,heads,or exhaust,youre not gonna see much with most internally stock engines with simple stuff.
You should have done a baseline dyno..see what Power the car has now,and then after the mods.Without even knowing your mileage,whos to say the engine isnt a bit tired or not?
Without changing the cam,heads,or exhaust,youre not gonna see much with most internally stock engines with simple stuff.
You should have done a baseline dyno..see what Power the car has now,and then after the mods.Without even knowing your mileage,whos to say the engine isnt a bit tired or not?
Pro
Joined: Jan 2008
Posts: 584
Likes: 1
From: Near Lockport NY Black 1986 Coupe
I have a 92 LT1 that I have just started doing things to. I am estimating the horsepower to be between 320 and 330 at the crank. What do you think? and also what do you think would be at the wheels?
thanks
92 LT1
K&N filter and cut lid
throttle body bypass
Magnaflow mufflers
1.6 roller rockers and lt4 springs
(i know these are NOT major improvements but i feel every lil bit counts)
thanks
92 LT1
K&N filter and cut lid
throttle body bypass
Magnaflow mufflers
1.6 roller rockers and lt4 springs
(i know these are NOT major improvements but i feel every lil bit counts)
The K&N filter and TB bypass won't give any power at all, and the cut lid barely does anything more than increase air flow. The mufflers might give a couple horses along with a bit of torque, but mostly its the rockers that added about 5 or so. You're looking at 310-315 at the very most, and that's if the motor performs as well as it was rated for.
As for the wheels, you didn't specify if you have a manual or automatic. For manual, you can estimate the power loss of the IRS to be, conservatively, around 10-12%. Think upwards of 15-20% for automatic.
Thread Starter
Instructor
Joined: Apr 2008
Posts: 154
Likes: 0
From: Parkville Missouri
thanks guys, i wasnt expecting big numbers. the air filter and filter housing were installed when i got the car a few months ago. i did the roller rockers recently and when i did that i did the tb. and soon mufflers, just for sound.
and it is a manual with 25k miles
and it is a manual with 25k miles
Pro
Joined: Jan 2008
Posts: 584
Likes: 1
From: Near Lockport NY Black 1986 Coupe
That, or an aggressive cam to go with those new rockers. Headers can be a pain if you plan on doing them yourself, but I suppose the cam can be just the same. Or there's always going for the intake.. but the stock LT1 was pretty good as is.
