Nitrous problems ,car will not pick up

I have been running an edelbrock plate system with a 89 nitrous jet and a 85 fuel jet with 5 1/4 pounds of fuel pessure pulling 9 degrees of timing for a total of 26 on the spray.car ran a 5.64 ,moved the jets up to a 102 on the nitrous and a 99 on the fuel side and the car ran a 5.66 and a 5.68 pulling 11 degrees total 24
the mph was not working at this track last night , but i took the car a couple months back to a different track i believe it picked up 1 miles an hour .,fuel pump is a magnafuel 500 set @26 pounds
converter has been checked its a 5000 ptc 9 inch car weighs 3240 ,c6 trans,any help with this would be appreciated,thanks UPDATE , new big shot plate 80 fuel and 90 nos jet. 5.1/4 pounds fuel pressure pullin 12 degrees of timing went 5.61 looking at the strap it looks like i can ad a degree of timing back in , buying a crank trigger so i can phase in the distributor .

4.390 bore
6.800 rod
4.300 stroke
tfs intake ,1150 dominator
69cc tfs street heads ported
35 degree timing
probe flat top pistons 13.6 compression
cam specs
275-283 @.050 .735 .733 lift
110 lobe sep installed @ 106 centerline
trans brake c6 with a 5000 converter 29x10.5 tire 4.10 gears
car with driver 3240
ngk number 10 plugs

[/quote]maybe try putting some timming back into it,say 4degrees and 1/2 pound of fuel,,Now if, your planning on hitting it harder with the spray?, I would tighten the converter up alittle. keep a close eye on your plugs , hope your run ngk's ?, I like to run a #8 to#9 anything obove 150 shot, hope this will help ya. 1970 mavrick

60' numbers? 330 numbers?

first of all is i would start out with a smaller tune ....... second the tunes you are talking about are way to rich . give S-I a call and discuss some baseline tunes before you do some serious damage ... btw what does she run n/a ?


oh and let me add one thing i run a 10 jet spread on my plate and the same fuel flow #s 5.25 and she might still be a hair rich ..........

richter69 wrote:60' numbers? 330 numbers?

1.26 60 Foot, no 330

bruno wrote:first of all is i would start out with a smaller tune ....... second the tunes you are talking about are way to rich . give S-I a call and discuss some baseline tunes before you do some serious damage ... btw what does she run n/a ?


oh and let me add one thing i run a 10 jet spread on my plate and the same fuel flow #s 5.25 and she might still be a hair rich ..........

how much timing are you pulling out thanks

10SHOTS wrote:

richter69 wrote:60' numbers? 330 numbers?

1.26 60 Foot, no 330

1.26 on all runs?

richter69 wrote:

10SHOTS wrote:

richter69 wrote:60' numbers? 330 numbers?

1.26 60 Foot, no 330

1.26 on all runs?

1.26 and 1.27 same on both jet changes.
my plate does not have a lot of spray bar holes. i been thinking about upgrading the plate to see if it will help some.

bruno wrote:first of all is i would start out with a smaller tune ....... second the tunes you are talking about are way to rich . give S-I a call and discuss some baseline tunes before you do some serious damage ... btw what does she run n/a ?


oh and let me add one thing i run a 10 jet spread on my plate and the same fuel flow #s 5.25 and she might still be a hair rich ..........

i have been 5.99, that day only could get a 6.10

when im on my 82 jet tune i gain between 7-9mph ..... just a thought

bruno wrote:when im on my 82 jet tune i gain between 7-9mph ..... just a thought

on this kit 104 104 jets is 250 shot. nos 225 is 82 i dont know why that is, unless its the the spray bar holes

We did a 102n 85f, 5.5psi with a 64 hole Cold Fusion plate on the kids 383 truck, went from a 13.20 motor pass to a 11.15 on the hose, pulled 10* from a 36* total timing.

My NX plate is a 8 hole deal that uses square jetting at the 200 and up levels, but its an alky set up.

Honestly I'd box up the plate, pills, noids etc and send it all to Steve J. at I.S.

richter69 wrote:We did a 102n 85f, 5.5psi with a 64 hole Cold Fusion plate on the kids 383 truck, went from a 13.20 motor pass to a 11.15 on the hose, pulled 10* from a 36* total timing.

My NX plate is a 8 hole deal that uses square jetting at the 200 and up levels, but its an alky set up.

Honestly I'd box up the plate, pills, noids etc and send it all to Steve J. at I.S.

x100000000000000000000

Call ult. Conv. Get a true 10" conv. 4000 rpm, go with a 3.73 gear. The harder you spray the car the more it will like. Your motor passes will suffer, but she will like the spray.

sounds to me like the cam is not ideal.

whatbumper wrote:sounds to me like the cam is not ideal.

The cam is not a nitrous cam but my cam grinder says the car will slow down with only a 250 shot with a nitrous cam. if i could get a cam that would pick me up a tenth on motor with my set up i would buy it .i just dont feel its possible

I just know no matter how much nitrous I threw on my last nitrous motor it would only pick up about 180hp so that is what we jetted it at. Yours just sounded familiar.

whatbumper wrote:I just know no matter how much nitrous I threw on my last nitrous motor it would only pick up about 180hp so that is what we jetted it at. Yours just sounded familiar.

You saying you was using a motor cam and that was happening ?

Yes. I had a NA cam

10SHOTS wrote:

whatbumper wrote:sounds to me like the cam is not ideal.

The cam is not a nitrous cam but my cam grinder says the car will slow down with only a 250 shot with a nitrous cam. if i could get a cam that would pick me up a tenth on motor with my set up i would buy it .i just dont feel its possible

have you talekd with Lem yet ?

bruno wrote:

10SHOTS wrote:

whatbumper wrote:sounds to me like the cam is not ideal.

The cam is not a nitrous cam but my cam grinder says the car will slow down with only a 250 shot with a nitrous cam. if i could get a cam that would pick me up a tenth on motor with my set up i would buy it .i just dont feel its possible

have you talekd with Lem yet ?

not yet , think i should ?

so i bought a big shot plate and put 90 nitrous and 80 fuel jets, should be around a 250 shot, 5 1/4 pound fuel pressure ,pulled 12 degrees of timing and went 5.61 , plugs look like i can ad a degree of timing back in so with a little more tuning i thing i can get into the 50s , back to the track again, 85 fuel and 95 nos jets pulling 13 degrees of timing, went 5.56 . the motor dont come down any on the shifts,need a different converter. i think im going to stop at this point with jets

10SHOTS wrote:so i bought a big shot plate and put 90 nitrous and 80 fuel jets, should be around a 250 shot, 5 1/4 pound fuel pressure ,pulled 12 degrees of timing and went 5.61 , plugs look like i can ad a degree of timing back in so with a little more tuning i thing i can get into the 50s

cool , now you are on the right track

10SHOTS wrote:so i bought a big shot plate and put 90 nitrous and 80 fuel jets, should be around a 250 shot, 5 1/4 pound fuel pressure ,pulled 12 degrees of timing and went 5.61 , plugs look like i can ad a degree of timing back in so with a little more tuning i thing i can get into the 50s , back to the track again, 95 fuel and 85 nos jets pulling 13 degrees of timing, went 5.56 . the motor dont come down any on the shifts, i think im going to stop at this point with jets

"10SHOTS",Question?,you said that when you went back to the track you changed jets from 90n 80f and ran 5.61. Then changed to 95f and 85n jets ???,and went a 5.56?,Congrats on a real nice pass! THANKS,MAVMAN.

10SHOTS wrote:

bruno wrote:

have you talekd with Lem yet ?

not yet , think i should ?

When I can't pick my car up, I talekd to Lem. He tells me I need to exercise and learn to spell.