TonyG > New Race Car Build Thread
05-27-2016, 01:13 PM
#1381
Rennlist Junkie Forever
Thread Starter
Also control of the throttle via DBW for blipping (rpm matched down shifts) and traction control.
The GM computer won't do it and I'm not are of anything less expensive than Motec that will.
TonyG
05-27-2016, 08:05 PM
#1382
Rennlist Member
That's odd, it's never seen over 6,300 and for the this season, all under 6,000 (running out of fuel above that). It let go when I pushed the clutch in for a 3->4 shift. at about 5,800. It was presumably cracked before that and the push from the clutch slave was the final straw.
I looked at a mini-twin, but couldn't spring for it. I am getting an aluminum pressure plate, which comes with a slightly smaller clutch - hopefully that will keep the forces down enough.
05-28-2016, 03:05 PM
#1383
Rennlist Junkie Forever
Thread Starter
That's odd, it's never seen over 6,300 and for the this season, all under 6,000 (running out of fuel above that). It let go when I pushed the clutch in for a 3->4 shift. at about 5,800. It was presumably cracked before that and the push from the clutch slave was the final straw.
I looked at a mini-twin, but couldn't spring for it. I am getting an aluminum pressure plate, which comes with a slightly smaller clutch - hopefully that will keep the forces down enough.
I looked at a mini-twin, but couldn't spring for it. I am getting an aluminum pressure plate, which comes with a slightly smaller clutch - hopefully that will keep the forces down enough.
How much time did you have on the pressure plate?
TonyG
05-29-2016, 04:17 PM
#1385
Rennlist Junkie Forever
Thread Starter
The modified MSD flows more than a modified FAST and has shorter runners.
It's a temporary upgrade until I get time to have a custom sheet metal intake fabricated.
... all of which is a temporary fix until I put in the next permanent engine....
TonyG
It's a temporary upgrade until I get time to have a custom sheet metal intake fabricated.
... all of which is a temporary fix until I put in the next permanent engine....
TonyG
06-14-2016, 03:47 AM
#1387
Rennlist Junkie Forever
Thread Starter
Gotta more stuff we threw at it...
Full Motec engine management
Jessel tool steel mechanical roller lifters and pushrods (which work with the Jessel shaft mount rockers)
Titanium exhaust valves (already had Titanium intake valves) with the proper valve seats and guides
New cam with a ramp angle to take advantage of the mechanical roller lifters, a lot more duration and a little more lift
New Tony Mamo ported intake
108mm DBW ported throttle body
Oh yeah.... it's on.
Coming up... new headers and a blown diffuser exhaust.
mu ha ha
TonyG
...
The harness are not "sealed up" yet... That won't happen until after testing just in case we need to make changes....
Full Motec engine management
Jessel tool steel mechanical roller lifters and pushrods (which work with the Jessel shaft mount rockers)
Titanium exhaust valves (already had Titanium intake valves) with the proper valve seats and guides
New cam with a ramp angle to take advantage of the mechanical roller lifters, a lot more duration and a little more lift
New Tony Mamo ported intake
108mm DBW ported throttle body
Oh yeah.... it's on.
Coming up... new headers and a blown diffuser exhaust.
mu ha ha
TonyG
...
The harness are not "sealed up" yet... That won't happen until after testing just in case we need to make changes....
06-14-2016, 09:21 AM
#1388
Rennlist Member
Looks phenomenal as always Tony. When are you going to ditch that RacePak nonsense? You're already running Motec engine management.
Gotta more stuff we threw at it...
Full Motec engine management
Jessel tool steel mechanical roller lifters and pushrods (which work with the Jessel shaft mount rockers)
Titanium exhaust valves (already had Titanium intake valves) with the proper valve seats and guides
New cam with a ramp angle to take advantage of the mechanical roller lifters, a lot more duration and a little more lift
New Tony Mamo ported intake
108mm DBW ported throttle body
Oh yeah.... it's on.
Coming up... new headers and a blown diffuser exhaust.
mu ha ha
TonyG
...
The harness are not "sealed up" yet... That won't happen until after testing just in case we need to make changes....
Full Motec engine management
Jessel tool steel mechanical roller lifters and pushrods (which work with the Jessel shaft mount rockers)
Titanium exhaust valves (already had Titanium intake valves) with the proper valve seats and guides
New cam with a ramp angle to take advantage of the mechanical roller lifters, a lot more duration and a little more lift
New Tony Mamo ported intake
108mm DBW ported throttle body
Oh yeah.... it's on.
Coming up... new headers and a blown diffuser exhaust.
mu ha ha
TonyG
...
The harness are not "sealed up" yet... That won't happen until after testing just in case we need to make changes....
06-14-2016, 01:34 PM
#1389
Rennlist Junkie Forever
Thread Starter
I actually really like the Racepak stuff. Especially at their price point.
And since there is nothing to be gained, and a lot of cash to change it out just for the sake of changing it out, there's no point. The dash is almost identical, the Smartwire works perfectly.
The computer on the other hand was a necessity. While the GM PCM is bullet proof will do almost everything needed (and they cost $90 on ebay) it won't properly do what's needed for flat shifting and throttle blipping. Yes you can do it, but it's sort of a hack job with respect to the methods needed to get the job done. And it will never be as smooth or as easy on the engine/trans as doing it with a PCM that has the functionality built in.
That said, the best, smoothest way to do torque reduction and thottle blipping is with a DBW throttle - which also allows us to have cockpit adjustable traction control. You can't do that with an OEM PCM.
And since we're now with a non OEM PCM, we can do per-cylinder engine tuning using 1 EGT probe per cylinder and dual wide band 02 sensors. That will allow us to pick quite a bit of free HP.
So the move to Motec was a necessity resulting from the installation of the sequential transmission... which allowed us to do some other things along the way to enhance performance.
I just can't wait to get the damn thing on the track....
TonyG
07-28-2016, 04:18 PM
#1395
Rennlist Junkie Forever
Thread Starter
I don't know the weight. I didn't weight it. but I'm probably going to use it to have a replica made in dry carbon/kevlar.
Tony
