unported TPI/Stock internal L98 goes 11.70 @ 119
03-01-2002, 10:34 AM
#1
Senior Member
Thread Starter
Join Date: Jul 1999
Location: Houston
Posts: 792
Likes: 0
Received 0 Likes
on
0 Posts
unported TPI/Stock internal L98 goes 11.70 @ 119
Does anyone remember Jim Secrest's Red IROC? I looked for the copy of GMHTP around here but couldn't find it. So I looked on the net. Here is the article:
MANNNN! I would love to put on some Nitrous after the blower. What are your thoughts?
Though the 5.7-liter engine has been left completely unaltered, don't mistake this car for a weak-in-the-knees stocker."My goal with this car is to go as fast as possible with an internally stock engine. I haven't even added headers to the car," Secrest tells us.
Accordingly, the first mod made by Secrest came from a bottle in the form of a 150 horsepower hit of nitrous oxide. While it definitely brought the car to life, it just wasn't enough.
The following year was greeted by the arrival of an intercooled ATI Procharger. Stuffing 12psi of boost into the already nitrous-sniffing mill was just the ticket to quell Secrest's longing for acceleration. The car has been in its current configuration for approximately three years with no parts breakage. That is amazing, and speaks volumes about proper tuning of a combination.
A complete MSD ignition system is responsible for lighting off the charge. This car, too, retains its stock ECM and even its stock chip. Secrest did tell us of his rearely seen dual PROM holder. "It automatically switches to the second chip when the nitrous system is activated. That chip is custom programmed to pull out timing and add fuel for use with the juice," he explains.
A 2,800rpm torque converter transfers power to the National-built 700R4. Stock exhaust manifolds dump into a Random Technology Y-pipe with catalytic converters and on through the 3-inch cat-back system.
The underpinnings of Secrest's IROC have been treated to some major enhancements. The suspension now sports a set of Eibach springs with Lakewood 90/10 shocks up front and AVO shocks in the rear. The suspension combination alone was responsible for whacking a whopping four-tenths of the car's timeslip.
The stock rear contains a set of 3.73 cogs. Rolling stock for the street consists of 17-inch billet Center Lines with matching BFG Comp T/As. AT the track, Secrest changes over to 16-inch Drag Radials. This car is definitely no poseur with a best pass of 11.70 at over 119mph. Sixty-foot times are good: in the mid-1.60's.
Accordingly, the first mod made by Secrest came from a bottle in the form of a 150 horsepower hit of nitrous oxide. While it definitely brought the car to life, it just wasn't enough.
The following year was greeted by the arrival of an intercooled ATI Procharger. Stuffing 12psi of boost into the already nitrous-sniffing mill was just the ticket to quell Secrest's longing for acceleration. The car has been in its current configuration for approximately three years with no parts breakage. That is amazing, and speaks volumes about proper tuning of a combination.
A complete MSD ignition system is responsible for lighting off the charge. This car, too, retains its stock ECM and even its stock chip. Secrest did tell us of his rearely seen dual PROM holder. "It automatically switches to the second chip when the nitrous system is activated. That chip is custom programmed to pull out timing and add fuel for use with the juice," he explains.
A 2,800rpm torque converter transfers power to the National-built 700R4. Stock exhaust manifolds dump into a Random Technology Y-pipe with catalytic converters and on through the 3-inch cat-back system.
The underpinnings of Secrest's IROC have been treated to some major enhancements. The suspension now sports a set of Eibach springs with Lakewood 90/10 shocks up front and AVO shocks in the rear. The suspension combination alone was responsible for whacking a whopping four-tenths of the car's timeslip.
The stock rear contains a set of 3.73 cogs. Rolling stock for the street consists of 17-inch billet Center Lines with matching BFG Comp T/As. AT the track, Secrest changes over to 16-inch Drag Radials. This car is definitely no poseur with a best pass of 11.70 at over 119mph. Sixty-foot times are good: in the mid-1.60's.
03-01-2002, 11:30 AM
#3
Senior Member
Thread Starter
Join Date: Jul 1999
Location: Houston
Posts: 792
Likes: 0
Received 0 Likes
on
0 Posts
I'm not necessarily impressed with the 1/4 mile time as I am with him running that time on stock tpi and putting both 12 # of boost and 150 shot of nitrous. Pretty amazing, huh?
03-01-2002, 11:42 AM
#4
TGO Supporter
iTrader: (1)
Join Date: Jul 1999
Location: Tucson, Arizona USA
Posts: 2,926
Likes: 0
Received 4 Likes
on
4 Posts
Car: 1987 Z28 Convertible
Engine: 305 TPI
Transmission: 5-speed
I'm not necessarily impressed with the 1/4 mile time....
I tend to agree. Heck, look at my results with 10# boost and no nitrous -- on a 305 at that. It scares me to think what would happen if I added a 150 shot....
Maybe I should contact GMHTP with stats on my ride.....
...as I am with him running that time on stock tpi and putting both 12 # of boost and 150 shot of nitrous. Pretty amazing, huh?
I think it's amazing that he can get away with two "intense" power adders on a stock bottom.
I tend to agree. Heck, look at my results with 10# boost and no nitrous -- on a 305 at that. It scares me to think what would happen if I added a 150 shot....
Maybe I should contact GMHTP with stats on my ride.....
...as I am with him running that time on stock tpi and putting both 12 # of boost and 150 shot of nitrous. Pretty amazing, huh?
I think it's amazing that he can get away with two "intense" power adders on a stock bottom.
03-12-2002, 02:41 AM
#6
Supreme Member
iTrader: (7)
Join Date: Nov 2000
Location: michigan
Posts: 13,039
Likes: 0
Received 0 Likes
on
0 Posts
it sounds a little far fetched to me, the two power adders together will make way more horsepower than the stock configuration can handle; not to mention stock exhaust...hitting about 120 at the traps woulnd't that be close or over 400 horsepower.
that's alot for an engine to take on stock steel components......but it definately sounds awsome; i would love to get mine to do that.
i wonder how he had his custom fuel setup?
definately impressive for a stock tpi in any means......... :hail:
that's alot for an engine to take on stock steel components......but it definately sounds awsome; i would love to get mine to do that.
i wonder how he had his custom fuel setup?
definately impressive for a stock tpi in any means......... :hail:
03-12-2002, 06:52 AM
#7
Member
Join Date: Nov 1999
Location: FALL RIVER MA USA
Posts: 391
Likes: 0
Received 0 Likes
on
0 Posts
I know Jim probably better than anyone here.
He built my motor and I purchased my first blower form him in 96.He owned Illusion Motorsports which is no longer in buisness.He marketed and engineered Impalla SS ATI supercharger kits in the mid 90s,he was the only shop to sell them at the time.One of his cars he built was featured in Chevy High Performance ,a 1996 Impalla making 700hp on 11 to 1 compression and 15lbs of boost and a 50 shot of nitrous.The car went a crazy 12.0 at 130mph buring the tires all the way down the track.It was built for the top end,goal was 200 mph.A couple of years later I asked about the impalla if it went any faster,he told me it went a low 10.And it was street driven.He is a straight shooter,I have not spoken with him since he left the Nickens brothers crew team.His car is an 89 like mine,but the motor is completly stock.It is not factory stock though.Motor is completly rebuilt stock motor ,but completly bluprinted.He even was using the stock manifolds and only a slp ypipe.He was using a switch chip that activated when the nitrous was activated.It pulled timing.I to questioned the use of nitrous with his car.He said he only hits it off the line to help spool up the boost fast,only past the 60fts,he does not run it all the way down the track.Im sure the car would run alot faster if he ran the nitrous all the way down the track,but the fact the engine has stock component is it still,is the limiting factor.And he know this.Its a full weight Iroc with AC and all the emmisions equipment.It is street driven so reliability is a concern.So to answer everyone question,the motor is completly stock yes,stock heads and cam,and internals.It is quite fast for what it has.He built it to hold together,and Im sure if he ran the bottle for a full run it would definatly hurt the engine.
He is a great guy and Im sure not into speed as we are at a young age,Jim is in his 50s if Im not mistaken,Im sure the car has enough power for him.I was actually on the phone with him when he was talking to Johnny Hunkins,he had the car stored away for a while,and was beng asked on the condition of the car if I remember correctly.He doesnt drive it much,but he has had that combo on the car for quite some time,mid 90s Im sure.Hope this answers your question.
He is a great guy and Im sure not into speed as we are at a young age,Jim is in his 50s if Im not mistaken,Im sure the car has enough power for him.I was actually on the phone with him when he was talking to Johnny Hunkins,he had the car stored away for a while,and was beng asked on the condition of the car if I remember correctly.He doesnt drive it much,but he has had that combo on the car for quite some time,mid 90s Im sure.Hope this answers your question. Trending Topics
03-12-2002, 07:56 AM
#8
Supreme Member
Join Date: Jul 1999
Location: Maryland
Posts: 2,844
Likes: 0
Received 3 Likes
on
2 Posts
Car: 2005 Subaru STI
Engine: 153ci of Turbo Power!
Transmission: 6-Speed
Geeez. When someone says stock bottom end it should be a stock bottom end ... as delivered from the factory. He should have said stock rebuilt bottom end 
Rebuilding the bottom end and not using SOME TYPE of better components never happens. Guaranteed that he has better rod bolts, better rings, bearings etc. Possibly weight matched all the rods, did some polishing, etc. When you think of stock bottom end you think of my motor. Its never been apart on the lowend. As delivered from GM.
Tim
Rebuilding the bottom end and not using SOME TYPE of better components never happens. Guaranteed that he has better rod bolts, better rings, bearings etc. Possibly weight matched all the rods, did some polishing, etc. When you think of stock bottom end you think of my motor. Its never been apart on the lowend. As delivered from GM.Tim
03-12-2002, 01:29 PM
#9
Senior Member
Join Date: Sep 2000
Location: Crystal Lake Il
Posts: 840
Likes: 0
Received 0 Likes
on
0 Posts
Car: '98 Z
Engine: LS1/6
Transmission: 4l60E
Im on a totally stock L05 bottom end (in the camaro and suburban)...not even new rings or rod bolts...two bolt mains. Its a lot harder than some people think to break these parts
03-12-2002, 04:27 PM
#10
Supreme Member
iTrader: (3)
Join Date: Mar 2000
Location: Warsaw, Indiana
Posts: 1,287
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1991 Firebird
Engine: 427 LSX
Transmission: Turbo 400
To my knowledge, there is no glory in having a stock bottom end. I cannot see why people advertise "I have a stock bottom end, take that!"
Ok well, I have one too besides a summit oil pump. Can I still be in the club?
Ok well, I have one too besides a summit oil pump. Can I still be in the club?
03-12-2002, 10:44 PM
#12
Supreme Member
oh yeah well mines forged so take that!
NO seriouselly i find it amazing, anyone with a stock bottom end and boost is usually nuts or knows what they are doing. a hint of detonation is all it takes....
NO seriouselly i find it amazing, anyone with a stock bottom end and boost is usually nuts or knows what they are doing. a hint of detonation is all it takes....
03-15-2002, 10:18 PM
#13
Member
Join Date: Sep 1999
Location: Amarillo TX usa
Posts: 207
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by 87Z-ya
thats cool and all but there are ls1's in the 9's on blower and juice with stock drivetrain.
thats cool and all but there are ls1's in the 9's on blower and juice with stock drivetrain.
03-16-2002, 11:54 PM
#14
Member
iTrader: (1)
Join Date: Jul 1999
Location: Tucson, Arizona
Posts: 247
Likes: 0
Received 1 Like
on
1 Post
Car: 1987 IROC Z28
Engine: 6.0L LQ9 crate engine
Transmission: Performa Built 700R4
Axle/Gears: 3.42 10 bolt, Eaton/Moser
Too expensive........
For the price of a Z-06 based car we could all easily modify a 3rd gen into the 9 second club and beyond, even NA with a BB............ 8-)
I like my 3rd gens, way easier to work on.........
Just my humble thoughts...........
I like my 3rd gens, way easier to work on.........
Just my humble thoughts...........
03-18-2002, 10:09 AM
#15
Supreme Member
iTrader: (3)
Join Date: Mar 2000
Location: Warsaw, Indiana
Posts: 1,287
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1991 Firebird
Engine: 427 LSX
Transmission: Turbo 400
How do you know the zo6 will go that much faster with slicks?? A cat delete?? Are you serious? Those are very well designed cats. You think that removing them will give 5 or six mph? Please post factual data supporting your statements. Or stop assuming information.
03-18-2002, 10:54 PM
#16
Senior Member
Join Date: Jul 1999
Location: Chillicothe Ohio
Posts: 760
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 RS 355/ 89 IROC Convert
Engine: Hot Cam 355/TPI 305
Transmission: All 700r4's
Hey the 3.8 block will hold up to 25# of boost on an intercooled turbo with proper tuning. Usually have to use alky injection to, but hey it will take it and is good for low 10's in the quarter(with other bol ons and chassis part) on a V6 :rockon:
IMagine id that could be harnessed on a 383, or 454!
IMagine id that could be harnessed on a 383, or 454!
03-22-2002, 11:39 AM
#17
Member
iTrader: (1)
Join Date: Dec 2000
Location: Columbia MO
Posts: 399
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1983 Z28
Engine: 350
Transmission: WCT5
Originally posted by 89IROCZZ4
I'm not necessarily impressed with the 1/4 mile time as I am with him running that time on stock tpi and putting both 12 # of boost and 150 shot of nitrous. Pretty amazing, huh?
I'm not necessarily impressed with the 1/4 mile time as I am with him running that time on stock tpi and putting both 12 # of boost and 150 shot of nitrous. Pretty amazing, huh?
.02
Clem
03-22-2002, 08:57 PM
#18
TGO Supporter
Join Date: Jul 2001
Location: Cheyenne, Wyoming
Posts: 4,991
Likes: 0
Received 1 Like
on
1 Post
Car: 1992 B4C 1LE
Engine: Proaction 412, Accel singleplane
Transmission: built 700R4 w/custom converter
Axle/Gears: stock w/later 4th gen torsen pos
Originally posted by GofasterFirebird
To my knowledge, there is no glory in having a stock bottom end. I cannot see why people advertise "I have a stock bottom end, take that!"
Ok well, I have one too besides a summit oil pump. Can I still be in the club?
To my knowledge, there is no glory in having a stock bottom end. I cannot see why people advertise "I have a stock bottom end, take that!"
Ok well, I have one too besides a summit oil pump. Can I still be in the club?
04-09-2002, 07:54 PM
#20
TGO Supporter
Join Date: Jul 2001
Location: Cheyenne, Wyoming
Posts: 4,991
Likes: 0
Received 1 Like
on
1 Post
Car: 1992 B4C 1LE
Engine: Proaction 412, Accel singleplane
Transmission: built 700R4 w/custom converter
Axle/Gears: stock w/later 4th gen torsen pos
I say that only because I agree with the quote.
Thread
Thread Starter
Forum
Replies
Last Post
