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      01-10-2020, 11:34 AM   #67
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Quote:
Originally Posted by motortrend View Post
Those are really good numbers. I have a VT2-625 and it puts down ~20whp less than that. If the G1 is less noisy and has the capability to put down another 20-25whp on top of that when coupled with meth and 93oct then it's probably worth the upgrade at some point. Any sound clips at idle? The vortech unit is unbearably loud at idle indoors.
The charts posted are in STD rather than SAE. Make sure you are comparing like for like.
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      01-10-2020, 12:22 PM   #68
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SAE is about 2.5% less than STD. Itís easy to do the rough math in your head to convert.
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      01-10-2020, 12:32 PM   #69
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Quote:
Originally Posted by M3R1 View Post
Any chance you can overlay the dyno of a typical VT2-625 kit over the one posted above?

Edit: SYT_Shadow beat me to the request...
Quote:
Originally Posted by SYT_Shadow View Post
You can also show it vs the 625 kit, understanding the 625 kit is more powerful

I like that this kit has less heat, more track worthy
I'll try to get something posted later today.

Quote:
Originally Posted by dozaiya View Post
has the maintenance interval for the supercharger oil changed?
Level check every 2500mi, change at 7500mi.

Quote:
Originally Posted by dozaiya View Post
is there any ETA of this non-intercooled kit?
Most went the intercooled route. Not even certain if a non-intercooled kit will even be released again, so too soon to tell.

Quote:
Originally Posted by motortrend View Post
Those are really good numbers. I have a VT2-625 and it puts down ~20whp less than that. If the G1 is less noisy and has the capability to put down another 20-25whp on top of that when coupled with meth and 93oct then it's probably worth the upgrade at some point. Any sound clips at idle? The vortech unit is unbearably loud at idle indoors.
Sure, I'll see if I can get some clips early next week.
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      01-10-2020, 01:06 PM   #70
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Quote:
Originally Posted by pbonsalb View Post
SAE is about 2.5% less than STD. Itís easy to do the rough math in your head to convert.
Right. Point is peak numbers are virtually identical to VT2-625 kits when properly compared. It's a good update, but not much of an upgrade IMO.
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      01-10-2020, 02:13 PM   #71
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I have not really studied the charts, but would be looking not at peak numbers but rather at 2000-4000 rpm torque numbers. Are those virtually identical?
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      01-10-2020, 02:23 PM   #72
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Quote:
Originally Posted by pbonsalb View Post
I have not really studied the charts, but would be looking not at peak numbers but rather at 2000-4000 rpm torque numbers. Are those virtually identical?
This is not intended to be an an upgrade path for your VT2 kit. Completely different system.
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      01-10-2020, 02:43 PM   #73
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Quote:
Originally Posted by pbonsalb View Post
I have not really studied the charts, but would be looking not at peak numbers but rather at 2000-4000 rpm torque numbers. Are those virtually identical?
As far as I can tell, yes. But would be nice to see SAE vs SAE charts to take the guesswork out and confirm this. VT2 vs G1 overlay charts would be even better.

Quote:
Originally Posted by tom @ eas View Post
This is not intended to be an an upgrade path for your VT2 kit. Completely different system.
Yes, exactly. That is what I was pointing out to motortrend . I wouldn't expect a 20-25whp gain from this as it's not intended to be an upgrade.
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      01-10-2020, 06:23 PM   #74
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Quote:
Originally Posted by M3R1 View Post
Any chance you can overlay the dyno of a typical VT2-625 kit over the one posted above?

Edit: SYT_Shadow beat me to the request...
Quote:
Originally Posted by SYT_Shadow View Post
You can also show it vs the 625 kit, understanding the 625 kit is more powerful

I like that this kit has less heat, more track worthy
Been on the dyno all day with an X4M Comp, will get something up after the weekend.
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      01-11-2020, 07:14 PM   #75
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Quote:
Originally Posted by Iyzmi View Post
The charts posted are in STD rather than SAE. Make sure you are comparing like for like.
Thanks, hadnít looked at that. Still would be a great option once the vortech goes bad if itís less noisy. Guess Iíll just start with meth and maybe a shorter diff ratio (6MT)
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      01-12-2020, 03:28 PM   #76
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Rod bearing job is strongly recommended before supercharging, correct?

What does regular maintenance look like on a supercharged motor? Curious what is required above and beyond the regular maintenance on a stock S65. The kit looks great!
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      01-12-2020, 08:05 PM   #77
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Quote:
Originally Posted by velociti View Post
Rod bearing job is strongly recommended before supercharging, correct?

What does regular maintenance look like on a supercharged motor? Curious what is required above and beyond the regular maintenance on a stock S65. The kit looks great!
Yes RB are recommended. Maintenance is the same except people usually change plugs every 10k.
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      01-13-2020, 11:44 AM   #78
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Quote:
Originally Posted by nycplumber View Post
Quote:
Originally Posted by velociti View Post
Rod bearing job is strongly recommended before supercharging, correct?

What does regular maintenance look like on a supercharged motor? Curious what is required above and beyond the regular maintenance on a stock S65. The kit looks great!
Yes RB are recommended. Maintenance is the same except people usually change plugs every 10k.
Got it. And doesn't the supercharger itself have oil that needs to be replaced at a regular interval? If so, how often?
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      01-13-2020, 12:59 PM   #79
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Quote:
Originally Posted by velociti View Post
Got it. And doesn't the supercharger itself have oil that needs to be replaced at a regular interval? If so, how often?
Answered in Post #69. Level check every 2500mi, change at 7500mi.
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      01-13-2020, 03:30 PM   #80
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Here's a comparison of G1 supercharger w/ 96.5mm pulley vs VT2-625 supercharger. Close in comparison, with a little more bottom end grunt from the G1. All runs on ACN91.



G1 Comparison runs on ACN91 w/ 96.5mm pulley and 93 octane w/ 94mm pulley.

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      01-13-2020, 05:34 PM   #81
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Quote:
Originally Posted by tom @ eas View Post
Here's a comparison of G1 supercharger w/ 96.5mm pulley vs VT2-625 supercharger. Close in comparison, with a little more bottom end grunt from the G1. All runs on ACN91.

All looks great.

So, the regular G1 is equivalent to the old 625kit, but has more midrange

Thank you!
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      01-13-2020, 06:59 PM   #82
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Very minor differences. Not enough to me to make a difference, but were I buying new and without a budget, Iíd choose the G1+ and add meth.
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      01-13-2020, 07:10 PM   #83
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Quote:
Originally Posted by SYT_Shadow View Post
All looks great.

So, the regular G1 is equivalent to the old 625kit, but has more midrange

Thank you!
Similar, and including all the other factors (lighter weight, cooler discharge, ultra-quiet, etc) discussed beforehand.
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      01-13-2020, 07:27 PM   #84
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Thanks for posting the dyno runs !!
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      01-13-2020, 07:32 PM   #85
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Quote:
Originally Posted by tom @ eas View Post
Similar, and including all the other factors (lighter weight, cooler discharge, ultra-quiet, etc) discussed beforehand.
Just that it doesn't spit out oil at the track sounds wonderful. Lighter weight and cooler are additional benefits
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      01-13-2020, 07:50 PM   #86
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Quote:
Originally Posted by pbonsalb View Post
Very minor differences. Not enough to me to make a difference, but were I buying new and without a budget, Iíd choose the G1+ and add meth.
How long does meth last for? Is it useable for a DD or is it only for the track?

Last edited by nycplumber; 01-13-2020 at 07:56 PM..
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      01-13-2020, 11:50 PM   #87
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Great results, thanks for doing and posting this comparison

576whp with 94mm pulley and 93 octane seems to be in the 630 crank hp range? impressive...
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      01-14-2020, 06:06 AM   #88
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Quote:
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How long does meth last for? Is it useable for a DD or is it only for the track?
Depends on the size of the tank and the flow. I donít know the nozzle(s) size/flow ESS is specifying or the tank size it uses. But yes, you can use meth on the street to add octane (and ignition timing if your tune can be linked to the meth) and cool the intake air. I ran meth on the street on my supercharged E36M3 and continue to run it in the street in the same car that is now turbocharged. I also run meth on the street in my naturally aspirated E90M3.

Usage depends on how much time you spend above the meth trigger point. Ideal trigger is load based. Aquamist uses injector flow to determine load, and starts spraying progressively. Mine is set to start at about 40% duty cycle. I drive each car 6-7k miles per year and donít drive like a hooligan all the time so my meth usage is low. I buy about 15 gallons a year. Diluted 50/50, thatís 30 gallons I spray.

I know people who track their cars and go through almost a gallon of mix in a 20 minute session.
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