How fast?

Old 01-01-2010, 03:45 PM
  #31  
Pwmax
Senior Member
MASTER BUILDER
 
Join Date: Jul 2006
Posts: 184
Default

It could run low 11's, maybe even 10's. Obviously a lot of factors will contribute to that though. 3890lb 69 Chevelle, 496, 9.7:1, mildly ported 781's, 240ish, .580 lift solid cam, Perf. RPM air gap, Quick fuel 850, 10 inch converter, 3.55 gears, drag radials theu 3 inch ex, all the way out the back, runs 11.20's at 122.

Frank
Pwmax is offline  
Old 01-02-2010, 01:25 PM
  #32  
whitey70ss
Senior Member
MASTER BUILDER
Thread Starter
 
Join Date: Apr 2009
Posts: 175
Default

Thanks Frank that gives me some hope! I'll be happy for a while with mid 11's .
whitey70ss is offline  
Old 08-02-2010, 03:56 PM
  #33  
whitey70ss
Senior Member
MASTER BUILDER
Thread Starter
 
Join Date: Apr 2009
Posts: 175
Default

Originally Posted by gungho
Yes I concur,but I was saying at best,with good weather and all dialed,but more like a mid twelve to start with.that would be just my guess,of course there are a lot of variables,I would go with the biggest cam the heads will allow if I were running a four speed.
Figured I would give you guys a update. First run off the trailer , left at a idle and ran a 11.96 at 119. Track got shut down. Went back the next weekend , the weather was in the mid 90's very high humidity. First run was 11.66 at 119mph. I just switched from 26 in slick to 28's and havent got to run the car yet. Thanks for all the help throughout my build.
whitey70ss is offline  
Old 08-02-2010, 04:31 PM
  #34  
Scooterz
Senior Member
RACING JUNKIE
 
Join Date: Mar 2006
Location: EUGENE,OR.
Posts: 3,402
Default

Good to see there is harmony in the RJ crib again. I don't know anything about those heads, so I kept my mouth shut. Besides, I have "Corvette" heads... don't need anything else.
Scooterz is offline  
Old 08-03-2010, 05:28 AM
  #35  
Pwmax
Senior Member
MASTER BUILDER
 
Join Date: Jul 2006
Posts: 184
Default

Sounds like in good fall air on a good track, it will go low 11's easily. Mid 90's and super humid, obviously is no good for good et's. 119mph, will turn into 122-123, maybe a bit faster with tuning. With that mph, you could hit a high 10 even, if you got the car to launch good.

For the record, we have built 2 496's this year, with those heads. Both sets were ported, one set a bit more than the other, but not what I would call radical porting. One was a hyd roller deal, made 700hp and 630tq on pump gas. The other was a solid roller deal, on pump gas, made 740hp and 650tq. Neither engine was set on kill.

Frank
Pwmax is offline  
Old 08-07-2010, 05:17 PM
  #36  
ballsout1
Junior Member
JOURNEYMAN
 
Join Date: May 2010
Posts: 28
Default

i had a 72 chevelle 468 all steel with flat top pistons closed chamber heads, similer cam, 4.88`s pump gaS motor.... ran 11,2`s all day....7.3`s eigth mile.
ballsout1 is offline  
Old 08-08-2010, 07:02 AM
  #37  
whitey70ss
Senior Member
MASTER BUILDER
Thread Starter
 
Join Date: Apr 2009
Posts: 175
Default

Yep I'm happy with it . Very nice to drive on the street (good manners). I think it has a lot more in it with some good air. Thanks alot guys.
whitey70ss is offline  
Old 08-09-2010, 10:37 PM
  #38  
cepx111
Senior Member
RACING JUNKIE
 
Join Date: May 2006
Posts: 2,044
Default

Going from a 26 tall tire to a 28 incher its gonna kill some ET so expect that.

You can compensate for that and pick some ET by Footbraking/stalling the car up as high as you can without pushing thru the lights.

JMO>Cp
cepx111 is offline  
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -