FI and 1/2 mile runs

Joe's_cool_1le · 05-11-2017, 03:25 PM

I know this can probably go in either here or the Dragstrip area but here goes.

I have two events coming up which are 1/2 mile runs but wanted to know if 1/2 mile runs are considered "long highway pulls" which could damage the rings in a FI application. The two events are below. Looks like I'll miss the first one but hoping to go to the second one.

NC @ Stanly County Airport on May 20th and 21st
VA @ Ingalls Field Airport on July 29th and 30th

https://wannagofast.com

Thanks in advance

*edit* Actually if I'm not mistaken it was mentioned that it wasn't so much due to FI but that the LT1's rings themselves were mainly the cause. I could be wrong though.

ShizzySupra · 05-11-2017, 03:54 PM

Log your IAT's. I took my 4th gen to the Shift S3ctor half mile event last year ended up having IAT issues. Thankfully I had a forged motor running on 110 octane so it wasn't as big of an issue but just keep in mind it is a decent amount of time where you are all in.

ProCharger · 05-11-2017, 05:31 PM

Personally I consider anything past 1/4 mile "long"

Its why a lot of guys like 1/8th mile stuff now with really high HP cars pushing it.
Cause its just WAY less time with the motor fully loaded sitting in high gear.

BH1 · 05-11-2017, 05:59 PM

Well this is disconcerting information. Someone please provide more detail as to the ring issue with regards to FI and the LT1

I did a mile event last year in my C6Z; along with my buddy's procharged C7. Neither of us new, or know, about FI LT1 issues under constant load.

I really want to go back to the mile and was planning on Procharging my SS in attempts to match my C6Z's numbers; don't think I can beat them unless I cam it too.

If I'm reading the posts above correctly, running FI on the LT1 is problematic under a long pull?

Joe's_cool_1le · 05-11-2017, 08:17 PM

I really haven't seen any failures but it's just what I've heard from a few on these boards. I've decided to do the July 1/2 mile run and will see what happens. I hope all is well but if not I'll be starting a new project a bit earlier then I anticipated. But I think she'll be fine.

BH1 · 05-11-2017, 09:04 PM

Quote:

Originally Posted by Joe's_cool_1le

I really haven't seen any failures but it's just what I've heard from a few on these boards. I've decided to do the July 1/2 mile run and will see what happens. I hope all is well but if not I'll be starting a new project a bit earlier then I anticipated. But I think she'll be fine.

Good luck and looking forward to your resukts. I'm curious as to what mph a supercharged SS will run in the 1/2 in relation to what my Z ran.

Still hoping for some feedback on the possible issues. I don't want to spend $5-6K on a supercharger that I can't comfortably run in a mile event.

Joe's_cool_1le · 05-11-2017, 09:18 PM

Quote:

Originally Posted by BH1

Good luck and looking forward to your resukts. I'm curious as to what mph a supercharged SS will run in the 1/2 in relation to what my Z ran.

Still hoping for some feedback on the possible issues. I don't want to spend $5-6K on a supercharger that I can't comfortably run in a mile event.

I totally understand. I spent twice that and needless to say I'd be disappointed if I need a tow afterwards. The registration doesn't open up until May 26th for the July race and I'll be on a cruise from May 20th to 27th so I'll definitely have to get the data package to be sure to get a spot. They only allow 135 cars per day. I'll PDR it and post it for sure.

DiGiam · 05-11-2017, 10:16 PM

The LT1 has very tight ring end gaps. I don't think 600+ hp and a 1/2mile are going to be a good mix. I guess you could install an exhaust gas temp sensor to see if it starts getting too hot but your guess is as good as mine as to when or what temp is the breaking point.

DiGiam · 05-11-2017, 10:24 PM

I don't know of many Camaro LT1 failures but there have been quite a few C7's with popped pistons. I think with more time tuners and drivers are more aware of it now and don't run them out that far so maybe that's the reason for some of the drop of in the Camaro LT1. On the C7's that popped, most were above the 650-700whp level.

GuywithL86 · 05-12-2017, 06:02 AM

You'd probably be fine

It's just that long pulls are the most difficult thing for fi. A single half mile pull while pretty long is not like taking it on a road course or a top speed run.

I would just think about how much it would effect you in the unlikely event you needed to repair the motor. I mean, you're life would me less stressful with some forged pistons and appropriately gapped rings, so you can always think of it like that.

out of the few boosted motors I've had, each time engine failure coincidentally was a ring land after a highway pull. None of them just went poof and failed since I did highway pulls all the time. It was more like long term abuse and eventually they popped.

I'd say go for it

BH1 · 05-12-2017, 06:51 AM

Quote:

Originally Posted by GuywithL86

You'd probably be fine...

....I mean, you're life would me less stressful with some forged pistons and appropriately gapped rings, so you can always think of it like that....

I'd say go for it

Thought about that, but that's getting into more expense than I'll be prepared. Way more expense, now that I think about it, because I'm the guy that says "well, while pistons are going in, might as well replace the heads; oh and that cam, let's just change that too"

oneredry · 05-12-2017, 07:23 AM

^^that's a pricey move^^ I guess you got to pay to play..

I like this thread, I've often had no cars in front of me and wondered what I could get it up to, then reality kicked in and I had a kid in my car.

GuywithL86 · 05-12-2017, 07:58 AM

Quote:

Originally Posted by BH1

Thought about that, but that's getting into more expense than I'll be prepared. Way more expense, now that I think about it, because I'm the guy that says "well, while pistons are going in, might as well replace the heads; oh and that cam, let's just change that too"

Just keep in mind these are performance motors and designed to be abused on a race track. I would imagine 5 laps on a circuit track with a stock motor is going to get the rings pretty darn hot as well.

They are not made of glass

I'm not much of a risk taker when it comes to blowing up my motor or trans, and I'd go for it.

Perdieu · 05-12-2017, 08:46 AM

I'll have a stock short block to sell in the next few weeks, I say go for it

Myself I wouldn't do it only because I seen a couple blow up from doing just that long hwy pulls. (main reason why I build a 416)

05-11-2017, 03:25 PM	#1
Joe's_cool_1le Drives: Black 2017 Camaro SS 1LE Join Date: Dec 2016 Location: Virginia Beach Posts: 1,319	FI and 1/2 mile runs I know this can probably go in either here or the Dragstrip area but here goes. I have two events coming up which are 1/2 mile runs but wanted to know if 1/2 mile runs are considered "long highway pulls" which could damage the rings in a FI application. The two events are below. Looks like I'll miss the first one but hoping to go to the second one. NC @ Stanly County Airport on May 20th and 21st VA @ Ingalls Field Airport on July 29th and 30th https://wannagofast.com Thanks in advance edit Actually if I'm not mistaken it was mentioned that it wasn't so much due to FI but that the LT1's rings themselves were mainly the cause. I could be wrong though. __________________ 2017 1LE SS Black - Mods - Forged - lowered compression - BTR custom Cam - Whipple, 3.500 upper and 8.0 lower pulley, Roto-Fab, 1 7/8 Kooks headers, off road pipes, & 3" Kooks full exhaust. LT4 fuel system, with Alky single nozzle running 100% meth. (not installed yet) DSX Tuning flex fuel and DSX tuning Aux pump

05-11-2017, 08:17 PM	#5
Joe's_cool_1le Drives: Black 2017 Camaro SS 1LE Join Date: Dec 2016 Location: Virginia Beach Posts: 1,319	I really haven't seen any failures but it's just what I've heard from a few on these boards. I've decided to do the July 1/2 mile run and will see what happens. I hope all is well but if not I'll be starting a new project a bit earlier then I anticipated. But I think she'll be fine. __________________ 2017 1LE SS Black - Mods - Forged - lowered compression - BTR custom Cam - Whipple, 3.500 upper and 8.0 lower pulley, Roto-Fab, 1 7/8 Kooks headers, off road pipes, & 3" Kooks full exhaust. LT4 fuel system, with Alky single nozzle running 100% meth. (not installed yet) DSX Tuning flex fuel and DSX tuning Aux pump

05-11-2017, 10:16 PM	#8
DiGiam Drives: 2016 NFG SS A8 Join Date: Jul 2014 Location: Valdosta Posts: 405	The LT1 has very tight ring end gaps. I don't think 600+ hp and a 1/2mile are going to be a good mix. I guess you could install an exhaust gas temp sensor to see if it starts getting too hot but your guess is as good as mine as to when or what temp is the breaking point. __________________ 2016 NFG 1SS A8. Pray ported intake manifold, Rotofab dry cai, kooks 2" catted longtubes, E85,

05-11-2017, 10:24 PM	#9
DiGiam Drives: 2016 NFG SS A8 Join Date: Jul 2014 Location: Valdosta Posts: 405	I don't know of many Camaro LT1 failures but there have been quite a few C7's with popped pistons. I think with more time tuners and drivers are more aware of it now and don't run them out that far so maybe that's the reason for some of the drop of in the Camaro LT1. On the C7's that popped, most were above the 650-700whp level. __________________ 2016 NFG 1SS A8. Pray ported intake manifold, Rotofab dry cai, kooks 2" catted longtubes, E85,

05-12-2017, 07:23 AM	#12
oneredry HYPER SS Drives: 2016 Supercharged 2SS Join Date: Feb 2014 Location: Troy OH Posts: 1,252	^^that's a pricey move^^ I guess you got to pay to play.. I like this thread, I've often had no cars in front of me and wondered what I could get it up to, then reality kicked in and I had a kid in my car. __________________ Ordered: 1/15/2016 2000 status 02/01/16 3000 status 02/29/16 3400 status 03/07/16 TPW of 03/14/16 4200 status 03/17/16 in transit! Delivered 03/23/16 2SS Hyper Blue \| 6M \| NPP \| Mag ride \| ceramic white Int. \| Black out bow ties \| P3 Gauge\| Front splitter. \| 6 pot upgraded brembo brakes. \| Magnuson Supercharger/95MM pulley \| Rotofab Intake \| ZL1 side skirts \| HRE FF04 wheels - Michelin PSS4 \| ZL1 add ons rock guards and lift points. \| AWE touring - resinated catback with link pipes.

05-11-2017, 03:54 PM	#2
ShizzySupra Drives: 16' Camaro 2SS Join Date: Sep 2015 Location: Oregon Posts: 381	Log your IAT's. I took my 4th gen to the Shift S3ctor half mile event last year ended up having IAT issues. Thankfully I had a forged motor running on 110 octane so it wasn't as big of an issue but just keep in mind it is a decent amount of time where you are all in.

05-11-2017, 05:31 PM	#3
ProCharger Drives: Many C7's Join Date: Apr 2014 Location: Kansas City Posts: 573	Personally I consider anything past 1/4 mile "long" Its why a lot of guys like 1/8th mile stuff now with really high HP cars pushing it. Cause its just WAY less time with the motor fully loaded sitting in high gear.

05-11-2017, 05:59 PM	#4
BH1 Drives: 2016 2SS M6 Join Date: Jun 2010 Location: McKinney, TX Posts: 144	Well this is disconcerting information. Someone please provide more detail as to the ring issue with regards to FI and the LT1 I did a mile event last year in my C6Z; along with my buddy's procharged C7. Neither of us new, or know, about FI LT1 issues under constant load. I really want to go back to the mile and was planning on Procharging my SS in attempts to match my C6Z's numbers; don't think I can beat them unless I cam it too. If I'm reading the posts above correctly, running FI on the LT1 is problematic under a long pull?

05-12-2017, 06:02 AM	#10
GuywithL86 Drives: Black Join Date: Jan 2017 Location: Nj Posts: 440	You'd probably be fine It's just that long pulls are the most difficult thing for fi. A single half mile pull while pretty long is not like taking it on a road course or a top speed run. I would just think about how much it would effect you in the unlikely event you needed to repair the motor. I mean, you're life would me less stressful with some forged pistons and appropriately gapped rings, so you can always think of it like that. out of the few boosted motors I've had, each time engine failure coincidentally was a ring land after a highway pull. None of them just went poof and failed since I did highway pulls all the time. It was more like long term abuse and eventually they popped. I'd say go for it

05-12-2017, 08:46 AM	#14
Perdieu Drives: 2017 Nightfall Grey Auto 2SS Join Date: Mar 2012 Location: Blue Springs MO. Posts: 525	I'll have a stock short block to sell in the next few weeks, I say go for it Myself I wouldn't do it only because I seen a couple blow up from doing just that long hwy pulls. (main reason why I build a 416)

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