snivley whiplash

iTrader: (4)

hay all got a very detailed message from Jim Mederer at racing beat on their set up of the dellarto dhla 48, here are the specs

needle and seat-300
venturi- 39mm
booster Venturi- 8011.1
idle jet holder- 7850.8, drill 1.40mm
Accelerator jet-80, drill .90mm
Diaphram return spring-9663
main fuel jet-230
main air jet-230
main emulsion-7772.8
idle jet-75
starter jet-95
starting emulsion tube-7482.4
float level-15mm
Accel pump cover- drill 21/64 x 1/16 deep in bottom of center recess; end mill shoulder with 13/16 end mill; counter sink.
center punch cross shaped spring boss; drill 21/64 until tip is level with body inner wall.
Choke pivot-91057, drill hole halfway with 1/4"
use mop special fittings
Choke bracket- slot; shorten base; reverse arm and weld
accel pump lever tip travel- 13/31" minimum
add racing beat accel pump spacer-rubber- avail from racing beat.

This straight from racing beat. I hope this helps others to get some where close when they do their set up. I am not far from this now and will be doing some minor changes based on this info.

Joe

RW-7

iTrader: (56)

Hey good info. Do you have a sorce for Dell jets and parts?

snivley whiplash

iTrader: (4)

no only source is dellarto in the UK. they have really good to me and the parts catalog online is really great, just search dellarto carb on line, great communication and parts were shipped next day. only took 8 to 10 days to get and always correct

t_g_farrell

iTrader: (1)

Ok so I posted an email to Dave that runs the gruntled site and heres his response:

So this info will soon get reflected there and forever keep folks enlightened.

Big thanks to Dave for making/maintianing his site.

snivley whiplash

iTrader: (4)

glad to share with everyone...great info is hard to find.

snivley whiplash

iTrader: (4)

just found the most important mod from racing beat set up after reading some older posts. drilling the primary jet holder to 1.4mm.
this jet holder is plugged in the top at the screw driver slot!! It needs air bleed to work correctly......finally can get my tune better.

hornbm

Seriously good information. Someone will really appreciate this one day. You should post this up in the first gen section if you haven't already. I'm sure those guys would love this.

pinoyremix

you do mean the idle jet holder right? I had to drill mine...

snivley whiplash

iTrader: (4)

yes

pinoyremix

funny thing with mine..is i made a thread about converting it from tuned for a 13b to work for my 12a....some how after i installed the fixed idle jet holder 7850.4..it was running super rich without the bleed hole ...i lost my 13b 7850.8 holders... i did notice with my car last time i was there...even though i had it tuned pretty good...i wasn't idling the best when the A/C was on...i know that the A/C takes a lot...other than that...its still running great...and gotta love that 2 barrel sound...

also...do you have a fmoc? if not i would recommend it...

snivley whiplash

iTrader: (4)

fmoc???

RW-7

iTrader: (56)

Joe, If you don't mind.. I would like to move this to the general 1G section.
Its a good thread and should be shared with all.

pinoyremix

front mount oil cooler....

snivley whiplash

iTrader: (4)

yes I have a custom bracket mounted oil cooler that is located forward and below the rad

t_g_farrell

iTrader: (1)

Just a bump for folks in the 1g section since this has been moved. Good info on the RB
modifications to the Dell early in the post.

snivley whiplash

iTrader: (4)

still doing some fine tuning, but man is this close to being like I remembered years ago on a repu with a 13b 4 port with a racing beat supplied dell and rb intake. going to drop the chokes in tomorrow and drop the mains one size and see how the numbers are. the low speed and tip in is awesome, the best it has ever run with the new engine.

keep ya posted

snivley whiplash

iTrader: (4)

so final tune is done. only changes made to run the set up on the 6 port to make it PERFECT are....39 mm chokes, jet primarys to 80 jet, drop main to 220 and leave the 230 air corrector in.......set idle mixture screws to 4-1/2 turns advance timing to 28 degrees at 4k rpm. My engine builder drove the car for the first time on Monday night(Jesus), his comments were " this car drives as nice as any fuel injected car I have driven, nice, really nice. I am impressed". That was the best comment I have ever gotten from anyone who has seen or driven my car, makes me feel really good on the progress and all the love and time I have put into the car to make it run correctly.
just thought I would share, I have learned soo much about the dells in the last month, just awesome.
I hope this info helps others to get the correct tune on their car as I did with mine.

Joe

thielepr

that for a street port?

snivley whiplash

iTrader: (4)

no this is on a stock port gsl-se six port engine with rb uim and dell 48

t_g_farrell

iTrader: (1)

I see the gruntled site has now been updated with the new info.

http://www.gruntled.com/Dellorto/Jetting.html