Which Blower Size for my 427??
#1
Advanced
Thread Starter
Which Blower Size for my 427??
Hey guys,
I would like some input on which Vortech head unit size/pulley you guys would recommend:
Current setup: 02 c5 coupe, m6 21k miles, ls7 clutch
LS7 based wet sump 427- 11.3:1 compression
-LS7 block; Eagle crank and rods, forged pistons with valve reliefs
-Texas speed LS7 heads, LS7 intake manifold
-Cam: 226/238 .598/.603 118+4
-ARH 1 7/8 headers, c5z titanium catback, 3.73 RPM diff, LPE mini tub, Wilwood brakes
I bought this car 6 months ago from a forum member local here in Colorado. He built this vette as more of a road course application, however I think it could be a great candidate for a nice centrifugal SC.
My goals are just spirited mountain driving, highway pulls and 3-5 times a year road course and Bandimere drag test n tune nights/ 1/2 Mile event in colorado springs. I am going for reliability and simplicity. I have had a 900+ whp YSI TA, single turbo c5z (800+whp e85), cts-v v1 paxton 1500(670whp), turbo jeep srt8 and V3 supercharged c6z (700whp). By far the most reliable and easy setup was the c6z (15k miles on build) and I am trying to replicate that, but I am shooting for a little more hp.
My hp goal is around 800+ (as you may know CO loses a lot of HP because of altitude 8000+ DA sometimes at the track). I don't mind too much about hp #'s as much as reliability, reduced belt slip and minimal complications.
I know the compression is a little high for a boosted application, the cam is also extremely mild but hopefully will be decent with a blower.
Just curious what you guys would suggest for a Vortech blower size and pulley, right now I am leaning towards the Ti with 8-rib Aux drive, meth and hold off for fuel- e98/clutch until next summer. The forged motor could probably be pushed a little further but I don't know if a YSi is worth it at this power level?
Any input is greatly appreciated-
I would like some input on which Vortech head unit size/pulley you guys would recommend:
Current setup: 02 c5 coupe, m6 21k miles, ls7 clutch
LS7 based wet sump 427- 11.3:1 compression
-LS7 block; Eagle crank and rods, forged pistons with valve reliefs
-Texas speed LS7 heads, LS7 intake manifold
-Cam: 226/238 .598/.603 118+4
-ARH 1 7/8 headers, c5z titanium catback, 3.73 RPM diff, LPE mini tub, Wilwood brakes
I bought this car 6 months ago from a forum member local here in Colorado. He built this vette as more of a road course application, however I think it could be a great candidate for a nice centrifugal SC.
My goals are just spirited mountain driving, highway pulls and 3-5 times a year road course and Bandimere drag test n tune nights/ 1/2 Mile event in colorado springs. I am going for reliability and simplicity. I have had a 900+ whp YSI TA, single turbo c5z (800+whp e85), cts-v v1 paxton 1500(670whp), turbo jeep srt8 and V3 supercharged c6z (700whp). By far the most reliable and easy setup was the c6z (15k miles on build) and I am trying to replicate that, but I am shooting for a little more hp.
My hp goal is around 800+ (as you may know CO loses a lot of HP because of altitude 8000+ DA sometimes at the track). I don't mind too much about hp #'s as much as reliability, reduced belt slip and minimal complications.
I know the compression is a little high for a boosted application, the cam is also extremely mild but hopefully will be decent with a blower.
Just curious what you guys would suggest for a Vortech blower size and pulley, right now I am leaning towards the Ti with 8-rib Aux drive, meth and hold off for fuel- e98/clutch until next summer. The forged motor could probably be pushed a little further but I don't know if a YSi is worth it at this power level?
Any input is greatly appreciated-
Last edited by AltitudeCO; 02-24-2018 at 07:54 PM.
The following users liked this post:
STL94LT1 (02-27-2018)
#4
Advanced
Thread Starter
Since I did not build my motor and the compression is a little high just wanted to see what people's thoughts were?
I have read multiple posts regarding the YSi vs Ti debate, why do you think YSI? I am all ears
#5
Platinum Supporting Vendor
For 800rwhp or higher need to start with Ysi and don't look back. Especially since you have crazy high DA's to fight with.
#6
Melting Slicks
It's a 427...anything less than a YSi would be pointless.
And there arent any sensible options larger than a YSi yet unless the ones ECS mentioned are available.
And there arent any sensible options larger than a YSi yet unless the ones ECS mentioned are available.
#8
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Thread Starter
How high do you think that compression can be pushed on 91 with meth? I'm not looking to break any records, just trying to find a happy median without having to replace drivetrain stuff (besides clutch). I know what other threads say with stock 427's or fully forged RHS blocks but this motor is a little different.
Last edited by AltitudeCO; 02-27-2018 at 11:23 AM.
#9
AMP Racing
Member Since: Aug 2006
Location: Washington TWP NJ
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2023 C5 of the Year Finalist - Modified
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St. Jude Donor '09-'10-'11-'12
As long as the tune is spot on, 91/meth should be fine at that compression... I would, however, suggest going E85 from the start. E98 would be even better, but that gets expensive.
#11
Advanced
Thread Starter
Ya E85 is definitely the safer route, only problem is I won't have a flex fuel sensor and here in CO we've seen as low as 55% content which is dangerous. 55 gallon drum of E98 is 3.10/gallon so not horrible. I'm wanting to stick with 91/meth if at all possible
Last edited by AltitudeCO; 02-27-2018 at 03:44 PM.
#12
Melting Slicks
YSI, ignite red, meth, and let her eat.
#14
Team Owner
Member Since: Jan 2007
Location: cookeville tennessee
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You will love the YSI.. Please it love to be over spun for getting a good 1,k to the rwhp. Just need to put a D/nozzle meth to her also.... Robert
#15
AMP Racing
Member Since: Aug 2006
Location: Washington TWP NJ
Posts: 10,446
Received 466 Likes
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2023 C5 of the Year Finalist - Modified
2017 C5 of Year Finalist
St. Jude Donor '09-'10-'11-'12
If you decide to go pump/meth, I have a buddy selling a really trick complete meth tank/nozzle setup. It’s in the FS section.
#16
Melting Slicks
#18
Melting Slicks
#20
Platinum Supporting Vendor
If you want to run a Ti get a V1 or V2 that is engine oil fed and then you can spin it harder than a V3 and make more peak power. I've seen RMCR use a V2 Ti and make 800rwhp on LS7 with 93/meth. Then later that same car made 900rwhp using E85 & meth on top. The engine oil fed is the way to go if you want to max out any headunit.