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

408 LT1 build

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Old Apr 16, 2008 | 12:39 PM
  #91  
Formula408's Avatar
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Well I got it to the track last night. first time up and I ran out of gear went 125 mph! Hit rev limiter pretty far before the traps too. I have it set at 6800 now. I was trying to launch it easy for its first night out which was difficult for the torque it has. My best 60 ft was a 1.70 and my best E.T. was 11.30, I ran race gas and only 31 degrees of timing. It pulls 100% strong to the 6800 rev limiter. Oil still looks good ! no water woohoo!
ive actually looked at those before and they look awesome IMO... no ridicule at all.. i was interested in them but didnt know how accurate they are... have u verified its accuracy with a mechanical FP gauge?
Gauge seems to work fine I havn't 100% verified it, but I did have a mechanical gauge on it and it read pretty equivalent but the two were not attached at the same time.
Old Apr 16, 2008 | 01:03 PM
  #92  
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Thought I saw you there last night, remembered your car from the video. Too bad I didn't get to see you run.

Track prep sucked. I couldn't hook even leaving off idle. I had the fastest non-qualifying speed 119.39, was happy with that.
Old Apr 16, 2008 | 01:26 PM
  #93  
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hopefully my taller hoosiers will give you a few more mph... then bump the rev limiter up... and maybe a little more timing
Old Apr 16, 2008 | 01:48 PM
  #94  
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very nice. 125 is good for about a 10.9.

Get your 60' down, and haul the mail.
What gears do you have in it right now?
Old Apr 16, 2008 | 01:54 PM
  #95  
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What gears do you have in it right now?
4.30s in a moser 12 bolt with a 26 inch street ET. The thing revs so fast and pulls so hard I hit the rev limiter in every gear at 6800. Hats off to you 9 and 10 sec 6 speed guys, thats doin some drivin' I've earned new respect!
Old Apr 16, 2008 | 03:56 PM
  #96  
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maybe drop it down to a 3.73 or 3.90 gear, that should help you with your trap.

125 and hitting the limiter has a ways to go yet.
Old Apr 16, 2008 | 04:35 PM
  #97  
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a bigger tire, more rollout too......
Old Apr 16, 2008 | 04:37 PM
  #98  
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Originally Posted by reamo04
maybe drop it down to a 3.73 or 3.90 gear, that should help you with your trap.

125 and hitting the limiter has a ways to go yet.
Personally, with that kind of power I think it would be a better choice to leave the 4.30s alone but put a 28" tire on it. More tire, better chance of hooking over the 26" tires, plus it the overall gearing would be approx the same as 3.90s w/26" tire.

Just my .02
Old Apr 16, 2008 | 08:14 PM
  #99  
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Originally Posted by FASTFATBOY
I see you like math, my 383 makes 600(ish) hp on pumpgas at 6500 rpm, so the other 2700rpm is only worth 50 hp??


I have seen a 396 LT1 make 740 hp naturally aspirated and not turn past 7500 rpm. How do you explain that?

David
Compression ratios for the 600 hp and 740 hp?
Old Apr 16, 2008 | 08:18 PM
  #100  
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Originally Posted by TitoPR221
Compression ratios for the 600 hp and 740 hp?
14.4:1 will do it easy
Old Apr 17, 2008 | 03:50 AM
  #101  
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I've seen 30" tires on F-bodies Bump that rev limiter up too.

Congrats!
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