LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Cam swap (to the smaller one :( )

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Old Jun 25, 2007 | 04:35 PM
  #16  
jasonisdn's Avatar
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i pointed him in a good direction.
Old Jun 25, 2007 | 04:36 PM
  #17  
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Originally Posted by Sweetred95ta
I'd take timing out and/or add more fuel. I really think, if you had a competent tuner street tune the car, you'd be happy with it. Honestly, the biggest difference maker in my car was the gears. I went from 3.73's to 4.40's and it made the car much easier to drive.
Oh Benji Benji, you helped me a lot. And you see I'm giving up now. Maybe before doing this I should try to change the gear to 4.10, and lets see finally if there will be a change or not.
Old Jun 25, 2007 | 05:22 PM
  #18  
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That was going to be my suggestion when I read you have 3.42s. More gear will help, and keep the Rs up a little more. I hope jasonisdn can help you out too. Good luck.
Old Jun 25, 2007 | 08:52 PM
  #19  
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Big cams aren't for everyone, but I do agree that you should try a 4.10
4.30 or 4.56 gear.
Big cams need big gears, hell I've got a Joe O. LE2 cam which is smaller
than yours and I've got 373's which I think are to little for me.
I'm gonna go 4.10 or 4.30's really soon.
Old Jun 26, 2007 | 12:27 AM
  #20  
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wow yeah try a 4.10 gear, you'll get rid of alot of the bucking
Old Jun 26, 2007 | 06:27 AM
  #21  
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Add me to the list recommending a gear change. With that cam I would think 4.30's or 4.56.

Tunning will make a difference as well. Not knocking Ion but you can only get so close on a mail order tune.
Old Jun 26, 2007 | 06:34 AM
  #22  
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with 4.30 or 4.56 will not it be like "drag only" car ? What about long trips? Or road races?
Old Jun 26, 2007 | 08:15 AM
  #23  
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Originally Posted by JustNO
with 4.30 or 4.56 will not it be like "drag only" car ? What about long trips? Or road races?
I loved my 4.40's. With a lean tune (15:1 a/f), I was able to get ~18 mpg. The only downside is you'd probably be shifting into 5th in the quarter mile; which is why I changed mine out to 4.22's. If you're road racing the car, I think you'd love gears that low. With the 4.40's, I was cruising on the highway at 70 mph @ 2k rpm. That's enough rpm to get it out of the surge area and not enough to cause horrible gas mileage.
Old Jun 26, 2007 | 09:51 AM
  #24  
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I have a cam similar to that 224/230 you're looking at with 4.10s. No driveability issues with a mail order and I can get 25mpg highway.
Old Jun 26, 2007 | 10:03 AM
  #25  
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4.10 with a cam around 224/230 dur. ?!! OMG and I'm using 3.42 with my current cam. Okay I will definitely try the 4.10. I don't want to go with bigger because I never use my car in drag races. And top speed is also important to me.
25mpg is great, but I have not a problem in highway, I have a gas mileage problem in the city. So please give me your city gas mileages.
Old Jun 26, 2007 | 11:13 AM
  #26  
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I have the 224/230 in my 355 and there is some slight bucking at low rpms but I am getting used to it. Its not very bad and I'll probably upgrade the gears later anyway.
Old Jun 26, 2007 | 02:00 PM
  #27  
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Originally Posted by JustNO
And top speed is also important to me.
Did you forget which transmission you have? According to this gear calculator, with 4.40 gears (just as a reference) you'd still be able to do 229 mph @ 6500 in 6th gear. You're car would never make it to that speed, but just saying that it's still possible.

http://www.5speedtransmissions.com/gear_calculator.html
Old Jun 26, 2007 | 03:12 PM
  #28  
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Hehe, tough to say what the city MPG is, if I'm driving in the city I use my right foot a lot. Although, I used it for the commute a while back and I believe I got ~20mpg in mixed driving with a good bit of stop and go rush hour type stuff. So that would probably put the city mileage at 15-16mpg if I didn't get on it much.
Old Jun 26, 2007 | 08:11 PM
  #29  
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Mine doesnt buck, and you can see the setup in the sig. My opion, is to find a dyno and find a reputable tuner to come tune it, put a 3.73 or better in it. If those 2 things doesnt suit you, then change your cam.
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