Author Topic: Data logging & understanding the stock ecu. Evolution of the TBI Monster to Mpi  (Read 62403 times)

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FunkyPhil

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As far as advertised duration numbers, yes its similar but the LSA is too tight.

I imagine that since you dont have the cam specs, you advanced 5deg from straight up rather than off the recommended ICL.

HR70 272/74 109ICL 26IVO 64EVO .435 Lift

 is what is on the receipt Scott posted but when I run the numbers, they seem a bit off.
87 Conquest Tsi: 519whp 519wtq 7.09@102--10.95@122
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At one time I had some spec's. I could not make much sense out of them. What I attempted to do was place the intake lobe center line to the degree the stock intake lobe center line was, what ever that # was? It was basically a recommendation from Indiana's site of what to do when cam specks were not available.

The approximant 5* advance transformed cam from a pos (when previously tried on a much earlier set up), to a cam that seemed like it might actually be doing some thing positive.

I suppose I could try a stock cam, but I have little time, energy and dollars these days for my car hobby. At this point my interest is more in improving drivability.

Do we have any cam cards posted on this site? I was trying to find a thread with some in on sqc, but I did not find it yet?

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This is what Steve at TEP sent me at the time.

You need to set the cam at exact split overlap. That means the intake and exhaust valves are both off the seat the exact same amount at TDC.

 

HR70 Cam Numbers

109 lc

26 Intake open
64 Intake Close

64 Exhaust opend
26 Exhaust Close

@ .006 lash

.435 lift

 

FunkyPhil

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I personally have a group of cam cards, but there is a list in the longblock section
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Ok, I got my head around the scnider 274 and hr 70 cam differences. That is some thing I should experiment with  some day.

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I final put a good run down at the track.  :)

1.750  60'
8.109  @  89.52  1/8
12.558  @  113.79

27 psi

FunkyPhil

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Nice Run!
87 Conquest Tsi: 519whp 519wtq 7.09@102--10.95@122
CLICK TO SEE BUILD

FunkyPhil

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This is what Steve at TEP sent me at the time.

You need to set the cam at exact split overlap. That means the intake and exhaust valves are both off the seat the exact same amount at TDC.

 

HR70 Cam Numbers

109 lc

26 Intake open
64 Intake Close

64 Exhaust opend
26 Exhaust Close

@ .006 lash

.435 lift

That would make it just a 270/70 109LSA/109ICL 52OL seat-to-seat. Depending on the .050 numbers, It might be descent. That seems like a good low end profile. May be a factor in getting to 6000.
87 Conquest Tsi: 519whp 519wtq 7.09@102--10.95@122
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FunkyPhil

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What was the difference between the 2?
87 Conquest Tsi: 519whp 519wtq 7.09@102--10.95@122
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TainterRacing

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Did you get vids of both runs? I found it a big help to have them if you do get the launch up close as you can. Then write down what you did how it felt. How you heated up the tires and Then do it a few times. Even if it was not the time you were looking for to see if the same results were gotten. Once you can duplicate a run once you get the right combo its not to hard to get it again and again. mmmmm Just looking I bet the track started to cool down and your tires did not stick as much maybe... That can be good. You want some wheel spin, allot of guys think if I get  tons of traction you get a good 60ft but you can get to much.

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27 vs 24 psi
higher launch rpm
1-2 shift was quicker by .25
2-3 shift was quicker by .15

I did not feel any spin, but the rpm log shows there was a little. I did have cool air and the track was fully prepped because the pro cars were testing for the saterday shoot out.

FunkyPhil

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Sounds like the right amount of tirespin! You shouldnt notice it when in the car. You want it to spin but also propel the car forward. But Im sure you know all of that. Nice run.

what are you using for ignition? Do you have a 2step?

87 Conquest Tsi: 519whp 519wtq 7.09@102--10.95@122
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No 2 step yet. It is a Mallory 6al, and I do not think i can use the msd 2 step modules with it. I do not want to spend the money on a modual when I could do it with ms, when and if that happens.

Bulding zero boost at the line does not help the 60'.

FunkyPhil

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true, but it greatly improves consistency. Just make the 2step pill
87 Conquest Tsi: 519whp 519wtq 7.09@102--10.95@122
CLICK TO SEE BUILD