Changing gears for nitrous

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Changing gears for nitrous Empty Changing gears for nitrous

Post  10SHOTS on August 6th 2014, 11:41 pm

Swapping out the 4.10s to 3.73 gears in hopes to better my e.t. On the spray , is this the right move or wrong more , a lot of local guys told me to put in 3.55s but I feel that's to much , any of you nitrous guys had any experience with this ?
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Post  Frank Merkl on August 7th 2014, 12:57 am

we started with 4.11's in the car with one kit we when to 3.89's and we picked up , 2 kits now with 3.70's and we picked up , now were playing with converters trying to get less than 5% slip going out the top end and we'll be 205- 210 mph out the big end , this is with a 33.0 -16 x 15 with 107 roll out
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Post  richter69 on August 7th 2014, 9:11 am

Need to know all the combo info first
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Post  10SHOTS on August 7th 2014, 12:07 pm

562 CID , 4.300 stroke 4.560 bore ,tfs 325 cnc heads 14.1 compression 1150 quick fuel
Tfs intake 284-298 @.050 114 lobe sep
Power glide 1.8 straight cut , ptc converter has 1150 drop on the shift ,
29.5 10.5 tire , car is 1995 mustang 3230 with driver
Using big shot plate 275 shot ,
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Post  richter69 on August 7th 2014, 1:23 pm

3.73 or even a 3.89 imo
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Post  gmsmkr on August 7th 2014, 1:26 pm

I vote the 3.90 gear for a start but you will probably end up with the 3.73.
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Post  whatbumper on August 7th 2014, 1:52 pm

with a 1.80 I would do a 3.73 and loosen the converter but if it was mine I would spend the coin for a 1.58 or 1.64 and stay with the 4.10 or 4.30.

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Post  10SHOTS on August 7th 2014, 2:15 pm

I tried a FTI ssw93c+ set up for car for 373 gears and a 300 shot , I ran it with a 410 gear and 250 shot and the shift drop was 600 , the car was slower than with the ptc converter with the 1200 shift drop on a 250 shot
So I put the ptc back in and going try 373 gears and 275 shot , maybe that will loosing the converter up some
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Post  nitrous.f on August 9th 2014, 8:06 pm

with the 1.80 first gear I have the same problem but I think a 3.27 on my software will allow me to use a 5500 stall nos converter and on the spray 200 shot stall to 6000 and will trap at about 6300- 6400 and real easy on the crankshaft rpm! Very Happy 
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Post  whatbumper on August 9th 2014, 10:44 pm

Where does your motor make power? That is pretty important. I may have missed that.

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Post  richter69 on August 9th 2014, 10:44 pm

Ill bet a 200 shot raises the converter a lot higher than 500 rpm, more so with tha tall ass gear.....
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Post  torino501 on August 10th 2014, 3:16 pm

10SHOTS wrote:562 CID , 4.300 stroke 4.560 bore ,tfs 325 cnc heads 14.1 compression 1150 quick fuel
Tfs intake 284-298 @.050 114 lobe sep
Power glide 1.8 straight cut , ptc converter has 1150 drop on the shift ,
29.5 10.5 tire , car is 1995 mustang 3230 with driver
Using big shot plate 275 shot ,

aside from the nitrous question isn't that 1150 a little small for a 562 cid..? just asking.

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Post  maverick on August 10th 2014, 6:25 pm

torino501 wrote:
10SHOTS wrote:562 CID , 4.300 stroke 4.560 bore ,tfs 325 cnc heads 14.1 compression 1150 quick fuel
Tfs intake 284-298 @.050 114 lobe sep
Power glide 1.8 straight cut , ptc converter has 1150 drop on the shift ,
29.5 10.5 tire , car is 1995 mustang 3230 with driver
Using big shot plate 275 shot ,

aside from the nitrous question isn't that 1150 a little small for a 562 cid..? just asking.

I think so, too but I'm no nitrous guy. This weak-sister 514 likes an 1150.
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Post  10SHOTS on August 10th 2014, 8:48 pm

Depends on who you talk to, 1150 seems to work good , I have been told with nitrous you don't need to use a big carb , I borrowed a 1250 once and it didn't change the e.t on the spray , I did not make any changes to the 1250 because it wasn't mine
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