429 issues !!

Page 1 of 7 1, 2, 3, 4, 5, 6, 7  Next

Go down

429 issues !!

Post  linearfab on October 1st 2014, 7:37 pm

we have a  .040  over 429   in our 57  ,car weighs  3750   at the starting line  .  
 the motor  has the stock  crank  . eagle rods and   some ole JE  flat tops  11.5.1  
has some  ported  scj heads(  .385 cfm at .700 lift)   and a 4150 supervictor intake
has a custom ground  bullet  solid roller   .738/.748    .266/.277  @.050   .  
and a quickfuel 950  carb  ...   3.89  rear gear on a 275/60 mickey pro radial  
c-6 trans  with a  9.5" converter   4000 rpm  stall
has  msd digital 7 ignition  and hvc2 coil , magnafuel prostar  500 pump and  magnafuel regulator and all supporting  fuel line  
 .. .. I really had  high hopes for this motor   but the best  I have netted out of it  is a  12.00 at 110 mph  it has a slight miss about 6000rpm but cleans  up and revs  out too  7200  or so ( at least that's where ive been shifting ) ... the  car  ran  better with a  smaller cam  and  iron passenger heads   11.76  116 mph  ...  I guess my  question  is    does anyone see anything   way  out of place   besides the compression  being on the lower end .?

linearfab

Posts : 72
Join date : 2014-10-01

View user profile

Back to top Go down

Re: 429 issues !!

Post  514Fox87 on October 1st 2014, 8:40 pm

First thing I see is carb. size. I'm thinking it needs more.
avatar
514Fox87

Posts : 436
Join date : 2009-08-08
Age : 52
Location : Harrington DE

View user profile

Back to top Go down

Re: 429 issues !!

Post  dfree383 on October 1st 2014, 8:48 pm

You need to put some inches under those heads, the motors too small for the weight and big heads.

Put a 4.300 or a 4.500 stroker kit in it ant it will run. Or go back to the small cam and heads.
avatar
dfree383
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 14160
Join date : 2009-07-09
Location : Home Wif Da Wife.....

View user profile

Back to top Go down

Re: 429 issues !!

Post  gt350hr on October 1st 2014, 9:07 pm

Pretty much everything you have already noted. Bigger , ported heads, too much camshaft, and not enough gear. 7,200 with a 275 and 3.89 gear should be 120+ mph. Your finish line HP at the rpm you're at for 110 mph is under 400. All the changes were for more hp at a higher rpm but the gear won't let you get there. Try a 4.57 if it's easier than going to a smaller cam.

gt350hr

Posts : 465
Join date : 2014-08-20
Location : Anaheim , CA

View user profile

Back to top Go down

Re: 429 issues !!

Post  rmcomprandy on October 1st 2014, 10:57 pm

linearfab wrote:we have a  .040  over 429   in our 57  ,car weighs  3750   at the starting line  .  
 the motor  has the stock  crank  . eagle rods and   some ole JE  flat tops  11.5.1  
has some  ported  scj heads(  .385 cfm at .700 lift)   and a 4150 supervictor intake
has a custom ground  bullet  solid roller   .738/.748    .266/.277  @.050   .  
and a quickfuel 950  carb  ...   3.89  rear gear on a 275/60 mickey pro radial  
c-6 trans  with a  9.5" converter   4000 rpm  stall
has  msd digital 7 ignition  and hvc2 coil , magnafuel prostar  500 pump and  magnafuel regulator and all supporting  fuel line  
 .. .. I really had  high hopes for this motor   but the best  I have netted out of it  is a  12.00 at 110 mph  it has a slight miss about 6000rpm but cleans  up and revs  out too  7200  or so ( at least that's where ive been shifting ) ... the  car  ran  better with a  smaller cam  and  iron passenger heads   11.76  116 mph  ...  I guess my  question  is    does anyone see anything   way  out of place   besides the compression  being on the lower end .?

Most of that combination can work fine as I have sorta used that recipe myself several times but, the cam is WAAAYYY to big for that application. It may be OK with using a FOUR.89 rear gearset and a 7,800 capable valve train.

My "alternate" Engine Masters entry this year is 450 inches with that head, compression and QuickFuel 4150 carb which makes almost 700 horsepower with a much smaller Hydraulic lifter flat tappet camshaft.

rmcomprandy

Posts : 5142
Join date : 2008-12-02
Location : Roseville, Michigan

View user profile http://www.rmcompetition.com

Back to top Go down

Re: 429 issues !!

Post  linearfab on October 2nd 2014, 4:13 am

guess ill have to swap gears . its frustrating to hear the cam is wrong esp when it was spec'd by bullet and ground for that set up. what about putting n02 on it and sprayin the shit out of it?

linearfab

Posts : 72
Join date : 2014-10-01

View user profile

Back to top Go down

Re: 429 issues !!

Post  DILLIGASDAVE on October 2nd 2014, 6:31 am

Do older JE flattop 429 pistons have a thick enough top/crown to convert them into zero deck 460 pistons? If so it could be a low buck way to gain some cubes by swapping in a 460 crank & modifing the original JE pistons & re-using the OEM length Eagle rods.
avatar
DILLIGASDAVE

Posts : 2187
Join date : 2009-08-08
Location : Texas. pronounced "texASS"

View user profile

Back to top Go down

Re: 429 issues !!

Post  rmcomprandy on October 2nd 2014, 8:56 am

linearfab wrote:guess ill have to swap gears . its frustrating to hear the cam is wrong esp when it was spec'd by bullet and ground for that set up. what about putting n02 on it and sprayin the shit out of it?

If it is a roller cam, just put your smaller camshaft back in it.

I am presuming that you did re-notch those pistons to accommodate the different SCJ valve placement.

rmcomprandy

Posts : 5142
Join date : 2008-12-02
Location : Roseville, Michigan

View user profile http://www.rmcompetition.com

Back to top Go down

Re: 429 issues !!

Post  linearfab on October 2nd 2014, 9:04 am

I no the pistons are super thick thats why we hung onto them . The old cam was solid flat tappit.we sold it a while ago .. and im not sure on the pistons being renotched . I dont think they wher

linearfab

Posts : 72
Join date : 2014-10-01

View user profile

Back to top Go down

Re: 429 issues !!

Post  linearfab on October 2nd 2014, 9:05 am

If i was to pull the motor and make this thing a stroker. What. CI would u guys recommend ?

linearfab

Posts : 72
Join date : 2014-10-01

View user profile

Back to top Go down

Re: 429 issues !!

Post  BOSS 429 on October 2nd 2014, 9:30 am

linearfab wrote:we have a  .040  over 429   in our 57  ,car weighs  3750   at the starting line  .  
 the motor  has the stock  crank  . eagle rods and   some ole JE  flat tops  11.5.1  
has some  ported  scj heads(  .385 cfm at .700 lift)   and a 4150 supervictor intake
has a custom ground  bullet  solid roller   .738/.748    .266/.277  @.050   .  
and a quickfuel 950  carb  ...   3.89  rear gear on a 275/60 mickey pro radial  
c-6 trans  with a  9.5" converter   4000 rpm  stall
has  msd digital 7 ignition  and hvc2 coil , magnafuel prostar  500 pump and  magnafuel regulator and all supporting  fuel line  
 .. .. I really had  high hopes for this motor   but the best  I have netted out of it  is a  12.00 at 110 mph  it has a slight miss about 6000rpm but cleans  up and revs  out too  7200  or so ( at least that's where ive been shifting ) ... the  car  ran  better with a  smaller cam  and  iron passenger heads   11.76  116 mph  ...  I guess my  question  is    does anyone see anything   way  out of place   besides the compression  being on the lower end .?

get rid of that carb,and camshaft,put a 4500 dom on it.


nothing wrong with iron heads, they can be fun
avatar
BOSS 429

Posts : 2229
Join date : 2009-08-10
Location : Ill

View user profile

Back to top Go down

Re: 429 issues !!

Post  linearfab on October 2nd 2014, 9:36 am

Im not gunna down grade the motor . Id rather make what i have work than go back to iron heads and a smaller cam . When i have a fortune in all of this and. The iron heads wher sold along time ago .

linearfab

Posts : 72
Join date : 2014-10-01

View user profile

Back to top Go down

Re: 429 issues !!

Post  dfree383 on October 2nd 2014, 9:40 am

linearfab wrote: Im not gunna down grade the motor . Id rather   make what i have work than  go back to iron heads and a smaller cam . When i have a fortune in all of this and.  The iron heads wher sold  along time ago .

How's it a downgrade if it goes faster? What you have ain't going
To work together with out a bunch of changes.
avatar
dfree383
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 14160
Join date : 2009-07-09
Location : Home Wif Da Wife.....

View user profile

Back to top Go down

Re: 429 issues !!

Post  linearfab on October 2nd 2014, 9:44 am

Not against ditchig that carb either . That was in my list for winter changes. . It might go faster but its still not were i want it to be . I wouldnt of spent the money i did to run the same . If makin it 521 ci is what it has to be to haul ass then i guess thats what ill have to do .

linearfab

Posts : 72
Join date : 2014-10-01

View user profile

Back to top Go down

Re: 429 issues !!

Post  cool40 on October 2nd 2014, 10:20 am

linearfab wrote: Not against ditchig that carb  either . That was in my list for winter changes.  .   It might go faster but its still not were i want it to be .  I wouldnt of spent the money  i did to run the same .   If makin it 521 ci is what it has to be to haul ass then i guess thats what ill have to do .
while your at it build big.parts cost the same either way.
avatar
cool40
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 7168
Join date : 2009-08-31
Age : 47
Location : on the 1/8 mile dyno

View user profile

Back to top Go down

Re: 429 issues !!

Post  gt350hr on October 2nd 2014, 10:38 am

Rev it up with the gear change but keep your eye on the intake valve springs ( seat pressure). You could spray it with the JE piston as it's plenty thick for NOS. Better fuel ( octane) and reduced timing will be a must do. The performance gain will be huge like in the low 11's , high tens possibly.

gt350hr

Posts : 465
Join date : 2014-08-20
Location : Anaheim , CA

View user profile

Back to top Go down

Re: 429 issues !!

Post  linearfab on October 2nd 2014, 10:45 am

What is a good ci to shoot for. Idealy. I wanted this motor to run low 11s or high 10s on motor .. was told by the builder. It should no problem .. with the old heads and cam. It went 11.75 on motor and 10.85 on a 200hp shot

linearfab

Posts : 72
Join date : 2014-10-01

View user profile

Back to top Go down

Re: 429 issues !!

Post  linearfab on October 2nd 2014, 10:47 am

Im in illinois so our racing season is basicly over so. I have all winter to tear it down and make it right

linearfab

Posts : 72
Join date : 2014-10-01

View user profile

Back to top Go down

Re: 429 issues !!

Post  glenevans on October 2nd 2014, 10:55 am

If it for drag racing primary usage, 100 more cubes (4.3 stroke), little bit more stall on convertor (but might work with the other changes), 4.3 or 4.56 gears for the weight of the car.

glenevans

Posts : 260
Join date : 2013-01-22
Age : 54
Location : No. Utah

View user profile

Back to top Go down

Re: 429 issues !!

Post  dfree383 on October 2nd 2014, 11:11 am

Boo boo
avatar
dfree383
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 14160
Join date : 2009-07-09
Location : Home Wif Da Wife.....

View user profile

Back to top Go down

Re: 429 issues !!

Post  linearfab on October 2nd 2014, 11:16 am

Boohoo ?

linearfab

Posts : 72
Join date : 2014-10-01

View user profile

Back to top Go down

Re: 429 issues !!

Post  dfree383 on October 2nd 2014, 11:27 am

linearfab wrote:Boohoo ?

Double post...... cheers
avatar
dfree383
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 14160
Join date : 2009-07-09
Location : Home Wif Da Wife.....

View user profile

Back to top Go down

Re: 429 issues !!

Post  linearfab on October 2nd 2014, 11:30 am

Thats cool Dude . Im here looking for help . If u dont have anything Good to add why start trouble ?

linearfab

Posts : 72
Join date : 2014-10-01

View user profile

Back to top Go down

Re: 429 issues !!

Post  dfree383 on October 2nd 2014, 11:32 am

linearfab wrote: Thats cool Dude .  Im here looking for help . If u dont have anything Good to add why start trouble ?  

I can add a lot of good to the this discussion and IMO already have, but if your too bull headed to listen what's the sense?
avatar
dfree383
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 14160
Join date : 2009-07-09
Location : Home Wif Da Wife.....

View user profile

Back to top Go down

Re: 429 issues !!

Post  linearfab on October 2nd 2014, 11:41 am

Im not too bull headed to listen . I simply stated im not goin to Switch the heads . Either way i spin it. Im spending money .. either spend money on iron heads and cam that will work with what i have that may. Not give me the room to grow. Or. Keep what i have and. Put more ci. In it .. u mentioned more cubic. Inch in ur first post. Which im agreeing with. I just dont agree with the heads and cam deal . Sure its an option. . Just not one i agree with. Sorry if that offended u

linearfab

Posts : 72
Join date : 2014-10-01

View user profile

Back to top Go down

Page 1 of 7 1, 2, 3, 4, 5, 6, 7  Next

Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum