hey guys im tring to build my 89 350 iroc into an 11 sec car i want to know what mods i have to put to do this. can some one help me out on these im going to be having around 900 bucks a month to spend maybe a lil more than that. i would really appreciate all the help i need to get it up at 11s without nos got to go beat some rice that hits 12 flats. thanks guys

 

nice ported heads, stealth ram, lt4 hotcam, 1 3/4 shorties, 3" full exhaust, cutout, 52mm TB, SVO 24# injectors, walbro 255 intank, 2400 stall, drag radials, NX wet kit (150 shot)

easily hit mid 11s on that setup..

 

how much did that cost u and are u street legal cause damn i need to smog it next year and how much would a supercharger help out after all those mods

 

I don't want to flame here but there is a search function on this website and there is 100 times more info than you're willing to read archived pertaining to mod plans and so fourth. I can't speak for the rest of the folks here but these same overzealous open-ended "i want 400 rwhp" threads are getting old. I understand kids get excited when they get a car like this but we live in reality. Tons of people on this board have big expectations for their cars too but they're thought-out viable mod plans and they have an idea of whats going on, and if they post on it its to discuss and refine these plans. Its another thing when someone doesn't really have an idea, isn't experienced in cars, and tosses out some ridiculously unrealistic goal. This might sound mean but its warranted when i hear someone talking about running 11's on a $900 budget. now that i got that off my chest, i'll try to answer this question.

I'll tell you what, 11's in street legal trim is a very tall order and supercharging is probably your most viable option. I built an N/A 377 for my corvette and it was very difficult and expensive to put together a decent combo (superram, 10.5:1 compression, AFR 195 heads, LPE 219 cam etc etc etc) that was emissions legal and that car will run no faster than 12's. I still have a ton of **** to do on this thing like convert ecms (so i can burn chips), have the base ported out, and i still have other misc. stuff to take care of all the while i haven't had time to really touch any of this stuff lately. ATI makes a very nice kit for our cars that comes with an intercooler, has self-contained lubrication, and can crank out a ton of boost (12+psi). If i decide to do something to my '88 GTA, that kit will be in my plans.

 

Redfirebird nailed it!

The only chance of even getting a high 12 on a $900 budget is to give a big shot of NOS. Once you put a NOS kit on, the life of the motor goes down dramatically.

My car is in the Mid 11's and it took alot of time, work and patience. Just an FYI, a good torque converter is gonna run you $500-700.

www.geocities.com/dzperf

 

i think you guys might want to re-read his post, he said that he will have like $900 a month....meaning that every month until he is done he will have $900 more to spend

 

thanks cobrakiller1989 at least u read it right. well yes ill have about 900 or more to spend on mods. i just got on here to see ur ideas and if u guys can help me get to 11s or low 12s. im not like all the other people i do want to get my car up at those numbers and i will.

 

RedIroc, if your goal is running 11's, look at what kind of HP numbers you need to be putting to the ground. That will ultimately depend on your car's weight.

Then figure out a combo that will give you that number.

I really like this page for looking at different engine combinations. I'm not sure if these numbers are at the flywheel or rear wheels.

http://www.ryanscarpage.50megs.com/combos1.html and check out some combos.

I like combo 16, with a streetable compression and cam:

http://www.ryanscarpage.50megs.com/combos2.html

Plus a 150 shot of nitrous would help too.

 

without NOS your looking at $8000+

with NOS your looking at $4000+, but a shorter lifespan of your car.

 

thats with a stroker kit am i right

 

That's a helpful little site, book marking that one.

 

http://members.tripod.com/~Vette383/1986-IROC-Z.html and http://vette383.tripod.com/ and http://members.tripod.com/~Vette383/1987-CORVETTE.html go to these sites and you will find most of your answers. I have seen both of these cars run in person, In Tulsa, Oklahoma.

 

Is that right?! That Vette ran 11.3 @ 120 w/ a 383, LPE 219 cam, and ported stock TPI manifold and plenum with ASM runners? How light is that car? That is CRAZY!

 

Yes it is right and nothing is missing except spare tire and jack. A/ C works, Power steering works...its all there. It weighs whatever the weight is for an 87 vette with out jack and spare. Check out the time slip for the race , he doesnt show the car he raced, it a 85 vette with alsmost the same combo and the 85 vette ran .04 faster but with less mph. Click on the et and mph and look at the time slip. It was a perfect day weather wise. http://vette383.tripod.com/

 

350 rwhp is a gang of power for a stock LTR setup. And 350 rwhp won't get you into the low 11's with a 3000 lb car. I have a very similar combo to that other vette and even i don't expect my car to make that kind of power, even with a superram. I wish i was wrong.

 

okay, my BS meter is off the Charts here.

You sure this car dosent belong to the ODB ?

hahahhahhaha


I suspect sneaky pete...

There is NO WAY stock LTR will support a 11.3 in a Full weight car.

We are talking In excess of 500 Horsepower at the motor.

Thats alot of Airflow, even for 11:1 compression.

Im gonna have a hard time swallowing that one, boys.

On a stock MAF chip to... LOL

I bet the car pulls 2 G's on the skid pad too.... after rolling through a puddle of Superglue.

 

lol okay I read a little further... his dyno numbers are almost bleliveable..

I think the track he ran at must be down Hill.

350 RWHP is barely enough to crack 12's.

 

Well say what you want It shows you guys dont know what your talkin about. Come to Tulsa international this weekend and you can see the 85 model run. This isnt BS its facts, sorry if you dont believe it, also The dyno numbers werent on a 47 degree day with
42% humdidity and 30.45 barometric pressure. It was an exceptionally good air day when he went the 11.39, so horse power was up. On and average air day it will run 11.60s all day. Some of you guys dont have a clue. Just because you havent seen it or cant do it doesnt mean it cant be done. Ive seen Both the 87 and 85 run these times! So believe it or not it happened and Like I said come to Tulsa International This saturday night and bring your money so we can take it from when you get spanked! And it will be done without NOS or Turbo or Supercharger!!!

 

350 rwhp is plenty to get into the 12's. I'm guessing I'm making 325 rwhp and I ran 12.39 in an F-body, which is heavier than a C4. He is also making 490 ft/lbs AT THE WHEELS. That is some MEGA TQ. What I can't figure out is how 350rwhp would give you a trap of 120MPH, unless that much TQ just accellerates the car so well it makes up for it? 11.60's are awesome for that combo too. I wonder if he'd gain anything w/ a SR? I think he'd see more HP b/c his HP peaks at 4800 rpm on the dyno, he could raise that rpm to about 5400 with a SR.
Is there anyway to get video of this car? I'd love to see it. I'm having a hard time believing it myself, but after hanging out on corvetteforum for the past few months, I think it's possible. A lot of those guys are running very well (mid to high 11's) with Lingenfelter's stuff.

 

Is this the same track that you say you ran 13.11 @ 101.6 with a 350 TPI & free mods ? If so I'm travelling out there to Tulsa to see if mine can run a 12 flat.

 

hey, ive seen a slight stock ls1, with no real engine mods... just a cam... run 11.8... i think that with some nice heads, 383, lt1 or HSR... etc... 11's are with in reach... hey.. almost 8,800 to spend in a year... u should be well on ur way...

 

There is a website at www.hardtail.com. There is some information about a 11 sec 87 IROC.

 

That car is basically a stripped out shell with a 454 BBC in it.

 

Still it is 11 seconds.











1988 IROC
350 tpi, 700r-4 B&M shift kit
Hooker Super Comp Headers
Flowmaster 80 Series Muffler
Holley AFPR, MSD Ignition
K&N
Best time 14.32 @ 96mph

 

You are mistaken about what 350 RWHP will get you. My car w/ driver weighed in at 3612 lbs at the time I made my 12.97 run (uncorrected @1250ft alt), and I only have 325 RWHP.

In a 3000 lb car you would be running 11.9's with 350 RWHP.

 

Yeah On that one I sorta convoluted myself..

I meant to say that 350 RWHP is good For Solid twelves, I don't know where the break 12's came from...

Still dosent point towards a 11.3

 

Facts are Facts, it happened!!! Gonna happen again this friday or saturday in Tulsa. If you guys have any members here that live in Tulsa ask them about the White 85 vette with the License tag LINEMUP and see what they say. Thats if of course you can find anyone who really goes to the track and races, seems most people here just talk and havent done it. This car has been running mid 11s for ten years now and its all there!! The 87 was built to run just like it and it worked. So believe what you want and keep getting your LT1 intakes and so on and come get some of the LTR vette! And if you look at Mike Crews camaro it runs 12.30s and its alot heavier car and has less motor. Search these forums hes a member and His Camaro Runs good and he actually does race it. If Mikes car can run this good on a less powerful motor dont understand why you guys doubt what these vettes run. Also didnt you read my post on the weather conditions for the day of the 11.39 pass. It was a great day. the temp, barometric pressure were totaly different then when it was dynoed and that also should give you a clue why it ran so good that day. Im done ranting but like I said get someone to come to the Track in tulsa this weekend and you will see!!

 

http://temp.corvetteforum.net/c4/bea...eResults.shtml
Heres another vette from a guy that has this website and I dont know him but, he has a simular motor to my firends vettes and look at what it runs!! Amazing isnt it!! So maybe you should do more research before you say someones posts are BS. Some people can make there cars run with parts that other people cant.

 

Okay.. First off...

That Sight you just posted is a totally Differant story, and Much more beliveable.

That guy pulled 362 RWHP... and 541 ft/lbs of Rear wheel torque.


Holy jesus! Thats alot of Torque for a NA small Block

And still he didnt run your Magic 11.3 at 120 mph

he could only Manage A 11.5 at 116.... with 50 ft/lbs More.

His setup uses the LPE Superram and is a Totally beliveable Setup, and Dosent really compare to your Claims at all.

I don't know what Bothers me More about this 87 vette guys Claims... the 11.3 slip, the 120 mph trap, or the 490 ft lbs out of LTR... Supposedly STOCK LTR too...

If you told me that Was a superram Setup, Id be alot more inclined to start Beliveing... But something dosent Add up here.

 

You cant read I guess! He said the torque was from his converter flashing so its not accurate and he also said its probably more like 480 or 490!! Second of all the dyno numbers my friend had werent made on a 47 deree day with 42% humididty and the barometric pressure was 30.45!! I guess you have no idea how much more horse power and torque a day like this would add to your motor. He dynoed with 60 degree air and 29.92 baro. Thats a big difference. He made the 11.39 on that perfect day, And like I said before, the car runs 11.60s on an average day. The guys black 85 has less compression weighs about 300 more pounds then my friends car also. And his heads arent as good as my friends. Have you got a clue yet?? And also ITS NOT A STOCK LTR SETUP. Didnt you read my friends website like I posted? It has ASM runners, Ported plenum, Ported by TPIS intake, 52mm throttle body! That is not stock! Try reading it all again and get your story and opinion straight!

 

Gee, I wonder where I got the misinformation About this modifications...


I didnt waste my time delving into the Long Mod lists You presented, I assumed that the people who had who had posted on this thread would have been correct.

Slowly Information is coming to light that is making this more and more beliveable... So befor eyou start Jumping On my case for doubting you, why don't you get up on the people who are miscontrueing the facts.

So now we have a LPE 383 w/ 219* Cam w/ aftermarket LTR, anything else you want to add ?

 

Perfectly good question. Good heads..afr's, dart's, good intake...lt1 conversion, headers $ exhaust system, nos or blower & custom chip.

 

Like I said learn how to read and dont go off of other peoples statements!!!! If you read all of my posts and the links I supplied you would know all this already, and you wouldnt have been talking all your junk about something you know nothing about!! You would think an experienced member as yourself would already know that by now. You opened your mouth without the facts so dont tell me about jumping on someone!! You stuck your own foot in your mouth not them!

 

WTF? I gave NO MISINFORMATION! Are you ****ing blind? Look at my post above, it says,
"Is that right?! That Vette ran 11.3 @ 120 w/ a 383, LPE 219 cam, and ported stock TPI manifold and plenum with ASM runners? How light is that car? That is CRAZY!"

Now look at the Vette guy's mod webpage:
http://members.tripod.com/~Vette383/1987-CORVETTE.html

And just to make it easier, I will also copy and paste part of the mod list from the Vette guy's mod webpage:

"383 ENGINE MODS:


CHEVY 350 "ZZZ" BLOCK, .030" OVERBORE
CHEVY 3.75" CAST CRANK
CHEVY 5.7" PINK RODS
FLUIDAMPR HARMONIC BALANCER
KB HYPEREUTECTIC PISTONS 11.0:1 COMP.
LPE CAM 219°/219°@.050 .525/.525 LIFT
COMPETITION CAMS 1.6 ROLLER ROCKERS
LPE L98 PORTED HEADS
MANLEY VALVES 2.00"I. & 1.56"E.
JACOBS SPARK PLUG WIRES
STOCK PORTED INTAKE MANIFOLD
ASM RUNNERS
STOCK PORTED PLENUM"

So what part of me saying he has a 383 w/ LPE 219 cam and ported stock manifold and plenum w/ ASM runners is MISINFORMATION?

 

Why do you keep referring to this other 85 vette when the car in quesiton is an '87 vette thats claims to run 11.3 with 350 rwhp? I'm sure this other vette runs 11.3. I'm also sure that '85 vette has a little more than a 383 that's stuck breathing through a straw. Don't show me the timeslip of the car in the other lane (the 85) and tell us this car ran .05 faster, making it an 11.3 second car and expect us to believe it. Where's the timeslip? Considering all that torque, and maybe with some big time weight reduction, slicks, a race suspension, and a bunch of luck, an 11.xx might be believable but the mph still wouldn't be that high.

 

Well he sold the 87 vette a few months ago and the 85 is still here in town and everyone in Tulsa that races knows about it. The 87 was built to run like it and it did. My friends 85 doesnt have a website so I put up the 87s instead. But you can see the 85 in person if you lived in Tulsa. And again some you guys and your ignorance about LTR cars who dont think they can run are just fooling yourselves. So think what you want im done trying to explain to people who dont have a clue and cant read. At least Buckeyeroc actually reads!! And his car actually runs at the track!

 

Noone here who frequents the "TPI" board, with the exception of you miniram folks , doesn't think an ltr setup can't run but we also know its limits. I own 2 tpi cars myself. Hell, if his setup is that fast, i'm happy for him, because i built my own 377 in a similar fashion and i'd love to have an 11 second car (the rest of my drivetrain might have something different to say.......) but i don't see it happening. 350 rwhp is a lot of power, exponentially so for an LTR setup, ported or stock. thats 420 crank hp. DD2000 isn't even that optmistic. Most people i've seen on these boards with nicely built NA 350's and 383's still end up putting around 270 at the wheels when using the ltr setup. There are exceptions, like kevin91z. He has a bad-*** tpi motor and even he doesn't put down that much power. I wouldn't believe those numbers but he posted a dynograph. and 11.3? you'd better be pushing 500+hp to trap 120 mph in a 3000 lb car, and i seriously doubt any NA motor will ever put down that kind of power breathing through tpi in stock configuration no matter how much porting you do.

Just my .02

 

To All - 350rwhp is enough to run mid 11's on average conditions. Look at Mike Crews' setup. His car is 3500lbs, he made 295rwhp and 400+rw torque and he ran a 12.39 !!!! His post is in the After Market Product review forum under the topic "383 Vortec TPI dyno results and questions" it's the topic with 4 pages! I will be running 11's no problem with a similiar setup (check sig.)

 

1bad91Z. Well im glad to see another member who knows what hes talking about! My faith has been restored here. Also my friends white 85 vette went 11.74 at 116.76 last night at Tulsa with no traction. He had a 1.67 60ft. Wouldnt hook up. Anyways thanks 1bad91Z!

 

You sure this car dosent belong to the ODB ?


Yeah, thats reaaaaaaaaaally funny. Too bad you guys don't know the ODB personally. He isn't full of BS and probably knows more than most all the people on this board. Thats ok, I'll just use his help (along w/ a few friends of his) and run better times than most with a similar combo. Sometimes this website us just too much like a bunch of high-schoolers. Grow up people!

 

Actually, you might want to check those numbers. To push a 3500lb car to a 12.39, you are looking at more like 364 RWHP

 

I live in Tulsa ,is this a white Vette with a wing on the decklid??
Ive seen this car rip some really good times!Get in touch with me by Email Red Z, I still go out once in a while

amxgreg@***.net is my new e mail.

 

Yes thats the Vette!! glad someone else here has seen it. Have you ever seen the Red87 that runs the same?

 

To REDZ28 - No problem!

To Desert86ROC - you are going by a formula to approximate 1/4 mile times. Actual time can and WILL vary depending on a WHOLE bunch of variables not calculated into your formula. I've personally seen a Mustang that ran a 12.70 with a motor that only made 268 at the back tires and it weighed 3,380. (And yes, that was an all motor pass beings he doesn't have any nitrous or a blower).

Not flaming, just giving my $.02

Mike (1bad91Z)

 

DITTO - An engine producing 350 RWHP at 4800 rpm will propell a 3200# car with 3.45 gears and 2500 stall a lot quicker than an engine proding 350 RWHP at 6000 rpm. Assuming traction, you're looking at something like 11.70's VS 12.10's. Using a 5.825 acceleration constant will grossly over estimate the amount of RWHP on the high powered low RPM engines.

 

This post is Way too Overplayed, But Ill add this last bit.

The Information is way to sketchy here, To back up the Claims.

Now it turns out the car was sold... but used to run these times. And then there is another one in town wich also runs similar times....

So whats the point ? Who's car is this.. where is it, How do we / you know whats really been Done ?

As for the misinformation thing, we have one guy saying its got a Ported stock lower, and another saying its a Ported Accel Base... Wich is it fellas ?

When you come onto a Board like this with Alot of people who are very familiar with the average power potential of the setup, And make Outrageous Claims like this, YOu had better have very Clear and compelling evidence To back yourself up, Or people are going to really question your legitimacy.

And the Comment about the ODB was a joke. Him and his 11 second stock 2.73 Geared cars... lol

Im Sure he knows what he is doing, but he also made some very outrageous Claims on this board a while back that turned out to be Nitrous Enhanced

 

Well my friends 85 has stock 3.07 gears and runs 11s!!!!!!!! Although I know you dont believe it!!!! The 87 ran 11.92 with the stock with 2.59 gears when he first put the motor in the vette from his iroc that ran 12.01! Bort read the link I gave in the beginning of this thread and you would know. And its been posted since then also!! Its a stock manifold ported by TPIS!!! The 85 has an Edelbrock manifold.