Changing gears for nitrous
+4
gmsmkr
richter69
Frank Merkl
10SHOTS
8 posters
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Changing gears for nitrous
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 ?
10SHOTS- Posts : 587
Join date : 2010-11-26
Age : 48
Location : Brookhaven MS 39601
Re: Changing gears for nitrous
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
Frank
Frank
Frank Merkl- Posts : 1524
Join date : 2008-12-17
Age : 68
Location : Brooks ,Alberta ,Canada
Re: Changing gears for nitrous
Need to know all the combo info first
richter69- Posts : 13649
Join date : 2008-12-02
Age : 53
Location : In the winners circle
Combo
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 ,
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 ,
10SHOTS- Posts : 587
Join date : 2010-11-26
Age : 48
Location : Brookhaven MS 39601
Re: Changing gears for nitrous
3.73 or even a 3.89 imo
richter69- Posts : 13649
Join date : 2008-12-02
Age : 53
Location : In the winners circle
Re: Changing gears for nitrous
I vote the 3.90 gear for a start but you will probably end up with the 3.73.
gmsmkr- Posts : 1364
Join date : 2014-06-22
Location : alabama
Re: Changing gears for nitrous
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.
whatbumper- Posts : 3024
Join date : 2009-11-11
Age : 44
Re: Changing gears for nitrous
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
So I put the ptc back in and going try 373 gears and 275 shot , maybe that will loosing the converter up some
10SHOTS- Posts : 587
Join date : 2010-11-26
Age : 48
Location : Brookhaven MS 39601
Re: Changing gears for nitrous
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!
nitrous.f- Posts : 294
Join date : 2011-06-05
Re: Changing gears for nitrous
Where does your motor make power? That is pretty important. I may have missed that.
whatbumper- Posts : 3024
Join date : 2009-11-11
Age : 44
Re: Changing gears for nitrous
Ill bet a 200 shot raises the converter a lot higher than 500 rpm, more so with tha tall ass gear.....
richter69- Posts : 13649
Join date : 2008-12-02
Age : 53
Location : In the winners circle
Re: Changing gears for nitrous
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.
torino501- Posts : 417
Join date : 2013-05-08
Location : THE GREAT STATE OF TEXAS!!!
Re: Changing gears for nitrous
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.
maverick- BBF CONTRIBUTOR
- Posts : 3059
Join date : 2009-08-06
Age : 72
Re: Changing gears for nitrous
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
10SHOTS- Posts : 587
Join date : 2010-11-26
Age : 48
Location : Brookhaven MS 39601
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