383backinblack

Haters can smooch my pickle.......

1st pull of the day.....freezing *** cold


this is the highest HP pull


this was the best overall average power, and highest torque....where im gonna stick for the time being.



Now if i can figure out why the ignition is eating it up top, and the power is falling off so early in the RPM range (the blower isn't even at 2/3 output yet where its dyin off) i can make some man power.

welp......its over 1,000hp at the crank.......FTW

AlkyIROC

How about putting in a high rpm ignition retard? At about 6000 rpm, have it drop the ignition timing back a few degrees.

5678TA

i thought that was at the flywheel to begin with! good job man.. get some video of that beast and hit the strip..

BADDEST305

very nice numbers. good luck with the ignition issue. new wires and new distributor and a new crank trigger straightened out my ign issuses.

Orr89RocZ

iTrader: (20)

very sick numbers man! i'm guessin that time in your sig is of a old combo? cuz with 800 whp i'd expect alot more than 138 mph haha but thats still MOVING

Demon355

iTrader: (1)

Damn that's ****ing awesome!

383backinblack

It has a digital 7 MSD with boost retard referenced through a 3bar map sensor.....its pulling some serious timing already lol......i dunno man, i gotta start someplace.......the cam is supposed to make peak power at 7500, and im not getting anywhere near that before the power starts falling off...break up aside
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thanks man......its lookin like i may have to go with the crank trigger

my plug gap is already at .028.....new plugs, new wires, new dist etc

im sure it'll suck to figure out, as does everything that involves electricity

BlueBeast

GOOD LORD THAT IS AWESOME!!!!

383backinblack

nope, that was last sunday......1st time at the track with this combination.

car was having that same misfire up top, and im on 26" tires, and need 28's......i was out of gear at like 1,000'

Schultzy89GTA

Awesome. I saw you post the other day and was wondering when we were going to see some numbers from the new combo.

Hang on!

-Schultzy

Orr89RocZ

iTrader: (20)

oh wow you have tons left in it then! good deal man

383backinblack

thanks man.......its gettin there a little at a time lol

Blackroc86

Wicked numbers and still lots of upside.

86Z

iTrader: (4)

wow, how much boost? i'm assuming your using a carb?

383backinblack

its only like 20psi right now....due to the lack of RPM
and yes its a blow-through carb
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Heres a video of the 1st pull of the day.....

Click here to see Video

383backinblack

heres a graph with both the 827hp pull and the 820hp pull, so you can see how much avg power it picked up across the board.....just with a slight jet change.

dont mind the weirdness in the graph, one pull starts higher, cause the pull didnt start recording until almost 4,000rpm lol.

daverr

iTrader: (1)

very nice .

Maybe your heads/induction cant support 7500 rpms.

knj8

wicked set up man that thing is gonna FLY!!!!!!!!!

383backinblack

its a single plane victor JR intake port matched......with fully CNC ported AFR 210cc heads, with 2.08/1.65 valves

everything is designed to flow enough air for this specific purpose......even if it wasnt, that blower would force it to comply.

strokeronthesause

if your using the valve springs that came with the afr heads that could be the culprit.......not enough seat pressure with that boost. just a suggestion.

Trevor86TA

Awesome. I look forward to the continous updates after each trip to the track.

383backinblack

ya dude, that was like 10 years ago lol......

its a solid roller with double springs over 400lbs.......the graph doesnt show valve float, and thats not what it felt like.

5678TA

just for the record, i dont have a blower motor, no 7k+ revving motor, and nowhere near the power you have.. and i have never monitored my a/f ratio or had my car dyno'd other then a baseline run a few years back..

this is some q's and stuff that i come up with:
valvetrain too heavy?? should be using lightweight retainers and such.. are you running 6.0 or 5.7 rods?? 6.0 rods will help it rev higher as well.. how big is the carb?? could be too small.. up top, the a/f ratio was richening..

and that doesnt look like valve float.. the power would drop off if it was floating..

JAYDUBB

Congrats man!!! Nice numbers!!!

383backinblack

all valid questions man.........the rods are 6"......the valvetrain isn't super lightweight, but its a solid roller with nasty springs, and was totally spec'd out to run at the RPM levels in question with heavy boost.......

the carb was built for the application by The Carb Shob, its a holley 950HP blow through carb.........my guess is the slight richening was due to the misfire not consuming the fuel and increasing the ratio of fuel/oxygen in the exhaust stream.......but i could be wrong.

strokeronthesause

are u saying u have 400lbs on the seat or open pressure? and do u have ti retainers?

383backinblack

i cant for the life of me remember, i've been looking for the sheet with the springs on it all morning.....

no, it has steel retainers

5678TA

http://www.hotrod.com/techarticles/e...gine_upgrades/

this is the recent article with the AFR 195 eliminators that made 615hp N/A.. theres a part on valvetrain that says if you shave weight off the retainers and lifters, you will gain rpm.. its on the second and third pages and the picture captions.. but since you are at it, you might as well read the whole thing.. its quite interesting..

so i do believe that your valve train MIGHT be a little too heavy to rev up.. these guys used all comp cams valvetrain.. all lightweight pieces.. but anyway, hope the problem gets solved..

383backinblack

thats a good article......my entire valve train is comp camps.....and just about everything was recommended by comp for the application, after some discussion back and forth of course.......and i have toyed with using the jesel shaft mount system for awhile now......it might be time to man up and spend the 1200 bucks lol

Orr89RocZ

iTrader: (20)

that might work out great... you probly have alot of cash into that motor...whats another 1200? haha

sixpackmtrspts

if you feel its a carb issue, send the carb to csu carbs http://www.csucarbs.com/ these guys are way ahead of the game when it comes to blow thru setups.

strokeronthesause

x2!!!!! thats who i used for my new setup

383backinblack

its definitely NOT a carb issue......the fuel curve is dead on, i love this carb. There is alot of buzz around about CSU's carb hats though

daverr

iTrader: (1)

spark plug gap?? spark plug heat range??

Octane???

what size is your exhaust headers??? the exhaust system???

383backinblack

.028......cold as f***.......1-3/4 to 3" collectors, Straight dual 3" pipes, open.

110 octane,and methanol injection.

Dr G

Incredble numbers!!!!

May I ask where you purchased the supercharger/intercooler etc and how much it cost?

RMK

Don't talk to me about electrical glitches. They are the biggest PITA there is.

Superb numbers. I too would be interested to know the cost and supplier for the supercharger.

383backinblack

the whole kit ended up costing me about 5300 bucks i believe, and that includes the blower, mandrel bends, hardware, couplers clamps, intercooler, race bypass valve, cogs (1 set) bolts, the power steering brackets, blower brackets etc......I got it from T-byrne motorsports......they were the best price

i probably spent close to triple that by the time i was done, and i didnt touch anything behind the firewall, it was already in place......i rebuilt the engine for the blower......and my rods, crank, block, heads, intake etc were already good enough parts. I just needed dished blower pistons and a blower grind cam........so hold onto your checkbooks if you want to start one of these projects.....

also, if you aren't a fabricator don't even try it. I've had to make more one-off parts and modify other parts to make the cog drive work on the street with power steering and an alternator. I had to buy some special alternator brackets from jones racing products, and then build the entire adjustment/bracing assembly from scratch........I also had to make the crank alternator drive pulley from a pulley for a 6bolt blower drive, located it on the crank cog, drilled and tapped the crank cog, and located it with dowel pins, took some machine work and patience....then hogged out the back of it to fit over the 3 balancer bolts.........just a whole slew of stuff like that.....

the F1 kits are basically a "race only" kit which means they send you a refrigerator sized box of parts and say "have fun"

TonyC

iTrader: (1)

Usually misfires will show up as a lean spike on a wideband. Because you're not actually using up the oxygen (doesn't combust) the oxygen gets into the exhaust, the O2 sensor senses it and calls out a lean spike. Wish I could see the graphs, darn work firewall

JamFitz

Out of curiosity, is there a view on what causes the spikes towards the upper rpm range? Is there an accurate output of manifold boost pressure? I'm assuming its not simply odd timing as its over rather a large range, it just looks almost wave-like in form, could cause somthing unwanted.

383backinblack

ya, this is true but at the power levels we're looking at the exhaust temps would burn up any left over fuel/oxygen in the headers.......so it wouldnt show on the wideband.......a 5gas analyzer would show the difference for sure, but those are a little pricey.....i can use one, but its at the guys leisure that owns it not mine lol
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the pressure is constant going by the analog boost gauge (mech) the timing is staying right where it should be really......

as for the exact cause of the weird spikes and pits, some of them go BACKWARDS which indicates wheel-spin on the rollers (sucks) my best guess at the rest is a misfire/spark blow out........keep in mind thats a raw graph too.....the smoothing is on zero .

1 DwnCam

AMEN Brother! I feal your pain!!!