E85 + stock turbos?
#63
07-19-2013, 02:10 PM
...and pay (relatively speaking) about 33% even higher prices for fuel than you pay now...
#64
07-19-2013, 02:10 PM
This thread had kind of been a running chronology of upgrades to my car. It is on Todd's 67mm VTGs now. I guess I should start a new thread now that it is complete.
#65
07-19-2013, 02:11 PM
Not even remotely true. E85 is significantly cheaper than premium gas (at least in the US due to silly subsidies). It also gets worse mileage. I've done the math on my car, and fuel cost is almost exactly the same, I just have to fill up more often. And I get way more power.
#66
07-19-2013, 03:38 PM
Picking it up tomorrow. Apparently my car just set Todd's dyno record for a VTG equipped car. Though of note - I did decide to add on every addon part there is. Essentially it is an alpha kit without alpha turbos.
Here's the dyno chart showing when I dropped it off vs now. Steady increases in runs are due to adding a part here, a part there. As you can see, the mid-range and top end where it was being choked off before, it no longer is.
I'll run 60-130s this weekend if it stops raining. No idea what to expect.
Here's the dyno chart showing when I dropped it off vs now. Steady increases in runs are due to adding a part here, a part there. As you can see, the mid-range and top end where it was being choked off before, it no longer is.
I'll run 60-130s this weekend if it stops raining. No idea what to expect.
#67
07-20-2013, 03:04 AM
Not even remotely true. E85 is significantly cheaper than premium gas (at least in the US due to silly subsidies). It also gets worse mileage. I've done the math on my car, and fuel cost is almost exactly the same, I just have to fill up more often. And I get way more power.
#68
07-21-2013, 09:39 AM
So several observations from driving this weekend:
It feels fast and very nice. I enjoy driving it very much.
The change in 60-130 from before to now - so the before/after dynos up there - is from 7.6 to 6.9. All performed with a 300lb passenger plus my 250lb self. So .7 improvement which is nothing to sneeze at. Road is 2.5% uphill for whatever that is worth. I don't know what else to do - Todd had the car in his hands and all checks out perfect. No idea how other VTG cars are getting such better times but I don't want to spend any more money trying to figure it out. Only other thing to do to the car would be alpha turbos and a built motor, and I just dont want to. I enjoy driving it so that's that. I'll take some good logs and shoot Todd's way to see if there's anything off perhaps w/ my fuel or the road conditions but that's it.
It feels fast and very nice. I enjoy driving it very much.
The change in 60-130 from before to now - so the before/after dynos up there - is from 7.6 to 6.9. All performed with a 300lb passenger plus my 250lb self. So .7 improvement which is nothing to sneeze at. Road is 2.5% uphill for whatever that is worth. I don't know what else to do - Todd had the car in his hands and all checks out perfect. No idea how other VTG cars are getting such better times but I don't want to spend any more money trying to figure it out. Only other thing to do to the car would be alpha turbos and a built motor, and I just dont want to. I enjoy driving it so that's that. I'll take some good logs and shoot Todd's way to see if there's anything off perhaps w/ my fuel or the road conditions but that's it.
#70
07-22-2013, 12:31 AM
The redneck racer in me says that 2.5% grade is probably worth at least .3 seconds on your overall 60-130 time, if not a little more. What kind of time are you expecting at your power level? Are you running 4th gear, or 3/4 with a shift?
#71
07-22-2013, 09:56 AM
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So several observations from driving this weekend:
It feels fast and very nice. I enjoy driving it very much.
The change in 60-130 from before to now - so the before/after dynos up there - is from 7.6 to 6.9. All performed with a 300lb passenger plus my 250lb self. So .7 improvement which is nothing to sneeze at. Road is 2.5% uphill for whatever that is worth. I don't know what else to do - Todd had the car in his hands and all checks out perfect. No idea how other VTG cars are getting such better times but I don't want to spend any more money trying to figure it out. Only other thing to do to the car would be alpha turbos and a built motor, and I just dont want to. I enjoy driving it so that's that. I'll take some good logs and shoot Todd's way to see if there's anything off perhaps w/ my fuel or the road conditions but that's it.
It feels fast and very nice. I enjoy driving it very much.
The change in 60-130 from before to now - so the before/after dynos up there - is from 7.6 to 6.9. All performed with a 300lb passenger plus my 250lb self. So .7 improvement which is nothing to sneeze at. Road is 2.5% uphill for whatever that is worth. I don't know what else to do - Todd had the car in his hands and all checks out perfect. No idea how other VTG cars are getting such better times but I don't want to spend any more money trying to figure it out. Only other thing to do to the car would be alpha turbos and a built motor, and I just dont want to. I enjoy driving it so that's that. I'll take some good logs and shoot Todd's way to see if there's anything off perhaps w/ my fuel or the road conditions but that's it.
I have Proto 63.5 vtgs with pump gas and .2 intercoolers. Best time was 7.2s for 60-130 when I was alone and it was about 55-60 degrees F outside.
A 0.7s improvement is definitely noticeable.
#72
07-22-2013, 11:00 AM
What was the temperature outside when you did the run? Jettison the 300lb passenger and watch the time improve.
I have Proto 63.5 vtgs with pump gas and .2 intercoolers. Best time was 7.2s for 60-130 when I was alone and it was about 55-60 degrees F outside.
A 0.7s improvement is definitely noticeable.
I have Proto 63.5 vtgs with pump gas and .2 intercoolers. Best time was 7.2s for 60-130 when I was alone and it was about 55-60 degrees F outside.
A 0.7s improvement is definitely noticeable.
#73
07-22-2013, 11:47 AM
If you drop the passenger, run in colder weather, go on a flat or little bit of a decline road I can see you running a 6 sec 60-130 and maybe even try brake boosting.
#75
07-23-2013, 08:15 PM
So - wasn't going to update until everything was 100% complete, but I've seen that people are mentioning my 60-130 times as fact and what my car/VTGs can run, so I want to give an update.
I called Todd and talked through my slight disappointment with the times. He asked for my logs, and in reviewing them together we came to an interesting discovery: I had/have a massive boost leak. Todd asked me to check a few things, and we discovered that the boost hose on the FPR had popped off. This caused several issues:
1) We were way way way lean
2) FPR had no boost input, thus wasn't raising fuel pressure, so we were running out of fuel. Like 130% IDC request out of fuel
3) boost leak = low boost
All this meant, at the time of my 60-130, we were significantly down on power. We corrected this and started logging again, and fuel/AFR and boost all look better.
Unfortunately, I had to go out of town, but when I get back in a few weeks I will take it out at night when it is cool, without a passenger and on a flat road, and re-run the 60-130. We fully expect a significant improvement in times. So sorry for the (again) delay, but stay tuned and I'll update what I can do when putting down the full 700whp.
I called Todd and talked through my slight disappointment with the times. He asked for my logs, and in reviewing them together we came to an interesting discovery: I had/have a massive boost leak. Todd asked me to check a few things, and we discovered that the boost hose on the FPR had popped off. This caused several issues:
1) We were way way way lean
2) FPR had no boost input, thus wasn't raising fuel pressure, so we were running out of fuel. Like 130% IDC request out of fuel
3) boost leak = low boost
All this meant, at the time of my 60-130, we were significantly down on power. We corrected this and started logging again, and fuel/AFR and boost all look better.
Unfortunately, I had to go out of town, but when I get back in a few weeks I will take it out at night when it is cool, without a passenger and on a flat road, and re-run the 60-130. We fully expect a significant improvement in times. So sorry for the (again) delay, but stay tuned and I'll update what I can do when putting down the full 700whp.