200 to a 250 shot...how much more drama?
#1
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the car has good internals, and a good set of rings. standalone fuel system. these pistons/ rings should have problem holding a 300 shot from what i was told by the builder. right now im using a 200 shot, but debating upping it to a 250. is there anything i need to be looking at that would be a short coming i wouldnt notice on a 200 shot? also its a nitrous daves plate not a direct port.
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When I went from a 200 to 250, the only thing that changed was that I broke the 12 bolt. I stepped the plugs down from a TR8 to a TR9 and pulled 2 more degrees of timing. You might want to reflow the stand alone to make sure you don't lose any fuel pressure on the 250 hit. I bet ATVracer and a few others have alot more insight on this than me.
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ya i have a gauge on the standalone. so far so good. im thinking with this size hit it might be better to do a 2 stage or progressive. in which case ill likely just leave it how it is. just kind of curious. i have all these pills and nothing to do with them!
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i would have no problem with spraying 250 though a nitro dave plate. as others said, look at your tuneup and plugs. i know many local tuners love trying to get away with as much timing as they can on the dyno. as you know, the dyno means nothing. you will be spraying 300 soon lol.
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#9
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if anything my tune up is a bit on the rich side right now. of course that will change if i up the shot but i wanted a little room for colder weather. right now i run a tr8 plug but it was tuned with a tr7. i just put the 8's in last plug change and never retuned it. i will likely pull 2 more degrees out next time i tune it anyways but if i do this i will pull 4. it will only be for track usage though. im stepping down to a 3.73 from a 4.10 and not sure how much its going to hurt. i will likely make a seperate tune and do so with a 150 shot for normal usage.
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Around 250 is where you have to be closer or you can hurt parts.
Rich with not enough timing isnt a safe tune up.
If your 200 shot tune was rich then pulling 4* instead of 2* and keeping the same jet spread and fuel pressure may not be "safe".
Lean it out and pull 4* or just pull 2*.
I'm no expert just my opinion.
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I tried 8s out on the street and they didn't last long. Just too cold of a plug. I think that if I would have had a separate nitrous and motor tune it would have been better. I was running it on just the nitrous tune with timing added back in with my Ramchargers timing tuner. This did not make up for the richened fuel tables though.
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Tommy- you said you have a lot of jets and I am in the need of some for a 125 or 150 if you have any laying around- I need fuel and N20. My old jets don't work in the new plate. If not no biggie
I still like the idea of a second stage, especially when pushing over 200. It is a lot less shock on the drivetrain/parts.
I still like the idea of a second stage, especially when pushing over 200. It is a lot less shock on the drivetrain/parts.
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I was talking about the tune up.
Around 250 is where you have to be closer or you can hurt parts.
Rich with not enough timing isnt a safe tune up.
If your 200 shot tune was rich then pulling 4* instead of 2* and keeping the same jet spread and fuel pressure may not be "safe".
Lean it out and pull 4* or just pull 2*.
I'm no expert just my opinion.![Angel](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_angel.gif)
Around 250 is where you have to be closer or you can hurt parts.
Rich with not enough timing isnt a safe tune up.
If your 200 shot tune was rich then pulling 4* instead of 2* and keeping the same jet spread and fuel pressure may not be "safe".
Lean it out and pull 4* or just pull 2*.
I'm no expert just my opinion.
![Angel](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_angel.gif)
Sounds like you are on track.
What type of power and compression is your motor N/A?
250 is a cake walk with our plate as long as the tune up is there.
AS you move up in these higher HP levels you need to be watching the plugs to find your hot cylinder.
Dave
What type of power and compression is your motor N/A?
250 is a cake walk with our plate as long as the tune up is there.
AS you move up in these higher HP levels you need to be watching the plugs to find your hot cylinder.
Dave
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Tommy- you said you have a lot of jets and I am in the need of some for a 125 or 150 if you have any laying around- I need fuel and N20. My old jets don't work in the new plate. If not no biggie
I still like the idea of a second stage, especially when pushing over 200. It is a lot less shock on the drivetrain/parts.
I still like the idea of a second stage, especially when pushing over 200. It is a lot less shock on the drivetrain/parts.