523 dove headed stump puller *** update***

Go down

523 dove headed stump puller    *** update*** Empty 523 dove headed stump puller *** update***

Post  fastbarry on June 13th 2012, 12:55 pm

i hit the dyno yesterday and was pretty imressed with my latest build. the motor ran pretty good for a couple pulls before having lifter pump up problems.


combo:

523cu. in.
4.4 bore
4.3 stroke
big valve dove c heads that flow around 330cfm at .600 lift (20 year old porting job)
weiand stealth intake
old 750 holley DP
2" open headers
hs roller rockers
8.8:1 comp ratio
34 dergrees of timing
87 octane

cam: comp shelf grind. 270h extreme 4x4
int. exh.
.554 and .574 lift
dur. at .050" 226 234
lobe sep. 111.0




the best pulls before the lifter trouble netted me with 615 lb ft torque at 3200 and 510 hp at 5500.

we never did find the torque peak because we had not pulled it low enough in the rpm range. the every pull the torque peaked at start.
i am sure by the look of the numbers, there would have been a bunch more torque down low if we had run it down to 2000 for a start.



what do you guys think?

i am curious if a different cam would pick this thing up even more down low.


barry


Last edited by fastbarry on January 10th 2013, 6:41 pm; edited 1 time in total
fastbarry
fastbarry

Posts : 72
Join date : 2009-08-18
Location : aberdeen, Wa

View user profile

Back to top Go down

523 dove headed stump puller    *** update*** Empty Re: 523 dove headed stump puller *** update***

Post  bigblok2000ranger on June 13th 2012, 3:16 pm

What are you doing with it? Looks like a torque monster! A custom cam may suit you good.
bigblok2000ranger
bigblok2000ranger

Posts : 1745
Join date : 2010-04-07
Age : 40
Location : Beloit,WI

View user profile

Back to top Go down

523 dove headed stump puller    *** update*** Empty Re: 523 dove headed stump puller *** update***

Post  fastbarry on June 13th 2012, 4:23 pm

it is going in a 5000 lb street cruiser trail toy truck. '74 f100 4x4
fastbarry
fastbarry

Posts : 72
Join date : 2009-08-18
Location : aberdeen, Wa

View user profile

Back to top Go down

523 dove headed stump puller    *** update*** Empty Re: 523 dove headed stump puller *** update***

Post  460bronco on June 13th 2012, 7:09 pm

Should have no problem moving that truck!!! Awesome pump gas build!
460bronco
460bronco

Posts : 343
Join date : 2010-04-07
Age : 33
Location : Meridian, Ms

View user profile

Back to top Go down

523 dove headed stump puller    *** update*** Empty Re: 523 dove headed stump puller *** update***

Post  fastbarry on June 14th 2012, 11:31 am

i was suprised by how little timing up top this thing wanted. peak power was at 34* and 36* dropped 9 hp at peak.

it also seemed to like being a little lean. i the area of low 13 afr's
bsfc came in around .42 - .45 in the meat of the pull.

i think this thing should make for a pretty good street motor.
fastbarry
fastbarry

Posts : 72
Join date : 2009-08-18
Location : aberdeen, Wa

View user profile

Back to top Go down

523 dove headed stump puller    *** update*** Empty Re: 523 dove headed stump puller *** update***

Post  Tennessee Bullitt on June 14th 2012, 10:34 pm

thought about a tighter LSA?
Tennessee Bullitt
Tennessee Bullitt

Posts : 582
Join date : 2009-08-25
Location : Ft Knox

View user profile

Back to top Go down

523 dove headed stump puller    *** update*** Empty Re: 523 dove headed stump puller *** update***

Post  fastbarry on June 15th 2012, 1:11 am

Tennessee Bullitt wrote:thought about a tighter LSA?

honestly no. but only because i dont know enough about the effect of lsa to spec anything diff.
what change would i see if i tightened it up?
fastbarry
fastbarry

Posts : 72
Join date : 2009-08-18
Location : aberdeen, Wa

View user profile

Back to top Go down

523 dove headed stump puller    *** update*** Empty Re: 523 dove headed stump puller *** update***

Post  fastbarry on June 15th 2012, 1:55 am

i did some reading on lsa. now have a little unerstanding of it.
fastbarry
fastbarry

Posts : 72
Join date : 2009-08-18
Location : aberdeen, Wa

View user profile

Back to top Go down

523 dove headed stump puller    *** update*** Empty Re: 523 dove headed stump puller *** update***

Post  hillbillyerv on June 15th 2012, 4:59 pm

nice numbers gives me a lil more hope for the iron 512 im buildin Twisted Evil
hillbillyerv
hillbillyerv
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 653
Join date : 2009-04-04
Age : 54
Location : mulberry,arkansas

View user profile

Back to top Go down

523 dove headed stump puller    *** update*** Empty Re: 523 dove headed stump puller *** update***

Post  fastbarry on June 16th 2012, 3:41 am

well turns out not only were the lifters pumping up, but i had a exhaust lobe going flat. Mad

fastbarry
fastbarry

Posts : 72
Join date : 2009-08-18
Location : aberdeen, Wa

View user profile

Back to top Go down

523 dove headed stump puller    *** update*** Empty awsome

Post  1971tjet on September 9th 2012, 9:29 am

That combo or something simular sounds like what im looking for good low end tourqe to get my 5000lb car moving .

1971tjet

Posts : 13
Join date : 2012-03-10
Location : sanford nc

View user profile

Back to top Go down

523 dove headed stump puller    *** update*** Empty Re: 523 dove headed stump puller *** update***

Post  BOSS 429 on September 9th 2012, 6:23 pm

fastbarry wrote:well turns out not only were the lifters pumping up, but i had a exhaust lobe going flat. Mad


pumping up/ thats what you want is for them to be pumped up at rpm, rockers set wrong?
BOSS 429
BOSS 429

Posts : 2278
Join date : 2009-08-10
Location : Ill

View user profile

Back to top Go down

523 dove headed stump puller    *** update*** Empty Re: 523 dove headed stump puller *** update***

Post  BOSS 429 on September 9th 2012, 6:26 pm

fastbarry wrote:well turns out not only were the lifters pumping up, but i had a exhaust lobe going flat. Mad


pumping up/ thats what you want is for them to be pumped up at rpm, rockers set wrong?
BOSS 429
BOSS 429

Posts : 2278
Join date : 2009-08-10
Location : Ill

View user profile

Back to top Go down

523 dove headed stump puller    *** update*** Empty update

Post  fastbarry on January 10th 2013, 6:40 pm

i just tore back into this thing due to some head gasket leakage.

i found sone pretty good scuffing in cyl number one. i am trying to figure out the cause.

i think we can get away with some honing and re-ring.


i had a thought, while it is apart, would there be any advantage to swapping on a pair of ported iron cj castings that i have on the shelf?
fastbarry
fastbarry

Posts : 72
Join date : 2009-08-18
Location : aberdeen, Wa

View user profile

Back to top Go down

523 dove headed stump puller    *** update*** Empty Re: 523 dove headed stump puller *** update***

Post  schmitty on January 10th 2013, 7:44 pm

There may be some advantage if you were going to use it higher up in rpm ranges, but port velocity is not going to be good down low. I would stick with the DOVE's if it were mine. I did a 552 several years ago, that made about 600hp on 110octane race fuel, with 18" of vac@1000rpm. It had DOVE heads too, and pulled off the line in mud drags like a freight train. Cool
schmitty
schmitty

Posts : 4538
Join date : 2008-12-02
Age : 49
Location : Holdrege, NE

View user profile

Back to top Go down

Back to top


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