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lots of mods but slow et. 

 

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 Post subject: lots of mods but slow et.
Posted: Sat Feb 16, 2008 5:52 pm 
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im running an el 4.0l with dev 5 cam, shaved tickford head, rebuilt bottem end (40 thou ova), full exhaust, rebuilt auto with cooler, 3000 stall, 3.73 gears n lsd. my best time so far was a 14.9 n yesterday i installed a chiptorque chip with custom tune . my best time was a flat 15.
this is s**t, has any 1 had any trouble like this b4 n could work out what mite b slowing my car down?

 

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97 el falcon, dev 5 package with standard tickford head, rebuilt acl 1mm ova size bottem end, rebuilt auto tranny, 3.7 minispool, au2 rims on ultra lows.
14.65 1/4 165rwkw

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Posted: Sat Feb 16, 2008 5:57 pm 
Getting Side Ways
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what do you mean "should pull 170, 180kw with new computer"?

go to jim mocks dyno and you will have that figure.

maybe convert to manual, or run a high stall in your auto, or fit some semi slicks for the run if traction is an issue.
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Posted: Sat Feb 16, 2008 6:02 pm 
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id look closer at the tune cos it should be capable of mid 13s, are you having problems with the launch?

 

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Posted: Sat Feb 16, 2008 6:21 pm 
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Mid 13's big ask from an auto EL....

dev5 is a large cam maybe the stock Head (no porting) is restricting the Cam's flow at high lift.

also did u get a before and after dyno readout with the Chiptorque chip ?
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Posted: Sat Feb 16, 2008 6:30 pm 
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sorry didnt read, i just figured it was a dev5 head.. dont you need to rebuild the rocker gear to suit the dev5 cam?

 

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Posted: Sun Feb 17, 2008 2:15 am 
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What was you 60 ft time? And MPH ?

You may find you might be missing in an area and gaining in others.


I think the stall might be part of the problem, perhaps either launching not well enough or even too well.

You should be able to get the 60ft time to about 2.1-2.3 and the trap speed to be around 160km/hr+.

 

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'95 EF XR8 auto, Advance headers, 3" exhaust, Cobra manifold, BBK 75mm throttle body , 80MM Marauder MAF, Vortech V2 T Trim , 307 rwhp, 405 ft/lb 13.2 @ 105 MPH

Now N/A (permanent Lag) - AFR 165's, Comp XE270 cam, 1.6 RR - 269 rwhp 14.1 @ 102mph.

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Posted: Sun Feb 17, 2008 11:13 am 
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if i stall the car up traction is an issue but if i jus sit there n punch it off the line its not too bad. 60ft time is about 2.3 secs n ova the line is high 140s or 150km/h. all the rocker gear has been rebuilt to suit the cam but the head is still fairly standard, i dunno how much its restricting me but i was still hoping for a mid 14 atleast. the car isnt running how it should ill try n get a dyno run in during the week n c what happens.

 

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97 el falcon, dev 5 package with standard tickford head, rebuilt acl 1mm ova size bottem end, rebuilt auto tranny, 3.7 minispool, au2 rims on ultra lows.
14.65 1/4 165rwkw

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Posted: Sun Feb 17, 2008 11:28 am 
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my mates 5 speed elxr6 has a full dev5 rebuild and he only pulled a pb of 14.59, prob could shave some time off that if he worked on the launch,

 

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Posted: Sun Feb 17, 2008 11:31 am 
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i did 12 runs on friday nite n without a set of slicks my times couldnt realy get any better. if i stall it up with stokies on it wheel spinns for bloody ages but if i jus punch it its not too bad.

 

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97 el falcon, dev 5 package with standard tickford head, rebuilt acl 1mm ova size bottem end, rebuilt auto tranny, 3.7 minispool, au2 rims on ultra lows.
14.65 1/4 165rwkw

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Posted: Sun Feb 17, 2008 11:46 am 
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That 60ft time is really slow for that set-up. I'd be really working on those launches to drop that 2.3sec down to at least a 2.1sec 60ft. Old saying goes, "Drop 0.1 off your 60ft, it'll drop 0.2 off your ET". So in saying that, if you could drop your 60ft down to 2.1 that'd bring your ET down to 14.4, which i'd say would be about right with that MPH your pulling over the line.

 

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Posted: Sun Feb 17, 2008 12:05 pm 
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gibbo wrote:
i did 12 runs on friday nite n without a set of slicks my times couldnt realy get any better. if i stall it up with stokies on it wheel spinns for bloody ages but if i jus punch it its not too bad.


try less tyre pressue and check your rear shocks, seems like your not getting a lot of weight transfer happening.
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Posted: Sun Feb 17, 2008 12:10 pm 
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its got pedders sports riders n ultralows in the bak n i was runnin 18psi.
i no i didnt mention this b4 but theres also a big stereo in the boot n a 2.5 tonne tom pack as well.

 

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97 el falcon, dev 5 package with standard tickford head, rebuilt acl 1mm ova size bottem end, rebuilt auto tranny, 3.7 minispool, au2 rims on ultra lows.
14.65 1/4 165rwkw

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Posted: Sun Feb 17, 2008 12:40 pm 
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what size tyres?
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Posted: Sun Feb 17, 2008 1:55 pm 
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high 140kmh? thats slow... id say its not making the right power, something is wrong.. with that setup u should be over 155kmh atl east
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Posted: Sun Feb 17, 2008 2:51 pm 
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eed-250 wrote:
high 140kmh? thats slow...


It sure is..... What gear and RPM are you pulling across the line?

 

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