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Terry,
I've
now heard this from many people about turbocharged engines - they like to be
loaded up with a tallish diff. Provided it doesn't bog off the line (big turbo)
a higher diff seems to work well. My 3.7 seems about right. I really thought it
would be too high, but it is fine. Minimises wheelspin too.
A
friend was running a similar car to mine (SRT in 1600) on the same night with
the same tyres and he was complaining bitterly of traction problems - he was
running a 4.4 LSD. Mine was hooking up nicely with the
3.7....
It
really depends a lot on your overall combination too - a heap of hot parts
doesn't necessarily add up to a fast car! Sometimes it takes a bit of persuasion
to get it all working in harmony.
PL
Anthony,
With 14 psi
you should be able to get in the mid to low 13's but you will need to
develop a technique that works for you to get a 510 off the line. An FJ with
a T03 and a relatively average size ic Cordia, Supra etc. will run 14 psi
quite happily. I'm not saying don't fit the monster but it's and urban myth
that a huge ic will improve your times or anything else other than collect
rocks without other modifications to take advantage of the lower charge
temps. I'd recommend a decent BOV (Blitz or Bosch RB) with the T03 as well,
they don't only sound good but do serve to reduce lag, and an FJ can have a
bag full of that if it's not setup right. Water injection is also a very
worthwhile modification to get some more go. Another small thing with the
FJt is the diff ratio, i found that a lot of ppl think first off that a very
low diff like a 5:1 is the way to go just like a NA engine, I found a low
diff just about useless with this engine, as it loves to push gearing as
well as rev. Somewhere in the range of 3.7 to 4.1 is about right although i
always wanted to shove a 3.54 in just to satisfy my idle curiosity, my best
recorded time with the stock ECU was with a 3.7 cig (13.3 at Castlereagh,
yeah i'm a sob). Maybe next time round i'll get around to trying it out with
a steep diff but it will be in a very different 510 who knows what
will be best as my '70 510 is a lot heavier.
2c worth and have fun
terry
Anthony La Malfa wrote:
Now that I finally have everything...
except my intercooler (size=$), after I get my intercooler from my
opinion and from what I've seen around (worse than mine) I don't think
I'm being unrealistic to be pulling times of 12.5's or less... am I... I
need some opinions. Datsun 1600 currently equipped with:Standard InternalsGarret T3 Turbo with 0.63 Rear
HousingRunning
14PsiHaltech ECU with
Programmable Ignition and Fuel (E6A)R200 300ZX LSD Diff5 Speed FJ20 BoxBrass Button Clutchand a Huge Mother &^%$ing intercooler sitting on the
front. Am I being
realistic? Anyone
going to the Jamboree??? Anthony
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