My HP estimation

Ok, The local DSM guys have helped me a little with my car, and we are estimating my car at 300HP... Here's the list of what's done to the car...

stock motor (fresh set of heads, a/b 10k on them), stock injectors, stock 14b
New headgasket (not sure of what one, but I wanna say Fel-pro)
now the mods:
Walbro 255lph
Turbo XS MBC (set at 16.5)
FMIC (not sure of dimensions, medium size)
2.5" exhaust
K&N filter
APexi SAFC-II
Zoom Stage II clutch
removed A/C, PS, and CC
cat delete
Mozart 4.5" Muffler

other mods (non-performance)
Autometer Boost, A/F, and Oil pressure gauges
17" Eagle Alloys with Riken Raptor (AA traction)
stripped out rear seats
few weight reductions...


The previous owner ran the car 8.7 in the 1/8 (translates to a 13.1 in the 1/4)
the owner before that ran it at 8.3 (translates to 12.8)
this was before the SAFC, exhaust, clutch, and tires (burned out past the grandstands)...

So the guys said the car (depending on driver) was capable of a mid 12...
All of this sound right?

No, yes, maybee. I've seen cars get into numbers where you scratch your head wondering what in hell just happend. Then Their are some of us (like myself) who cant get a decent time slip if god came down and sat next to us... I've heard of people getting into the 12's with less..

ok, so it's quite feasible...?!?... I just know what the guy's around here have told me... I'm new to the 4g63... trying to work my way up...

Forgot to mention

Magnastar 8.5mm wires
NGK iridium plugs

Idk that those will make much of a difference... but who knows...

Why not just dyno it and get some real numbers if you are really that interested in how much power you are making? That would solve all the guessing and you would know where you really stand.

ok, so it's quite feasible...?!?... I just know what the guy's around here have told me... I'm new to the 4g63... trying to work my way up...

Forgot to mention

Magnastar 8.5mm wires
NGK iridium plugs

Idk that those will make much of a difference... but who knows...


When I had my walbro pump and with my mods listed I hit a 13.301 in the 1/4 on 18psi. So...it could happen.

Why not just dyno it and get some real numbers if you are really that interested in how much power you are making? That would solve all the guessing and you would know where you really stand.

True, and I completely agree with you... but the problem is, I work 8-5... and there's no local dyno's... they're all a couple of hours away...

I would really love to dyno it, but I can't take a day off work to drive way outta town and do this... I'm looking to estimate for the moment... once I get the entire setup straightened out, and have had a chance to know what condition everything is in (I've had the car two weeks)... then I'll plan a trip to the dyno...

300 hp on a 14b pushing 16 pounds of boost? I cant imagine that much power with that set up. I would guess like 240-250.

300 hp on a 14b pushing 16 pounds of boost? I cant imagine that much power with that set up. I would guess like 240-250.

I've walked on by Camaro SSs'... Mustang GTs'...

I feel that if I were only putting down 240'ish, that the Bonneville(SSEI) I raced woulda hung w/me... but it did no such thing...

I'm up running w/ Sti's (stock+ intake/exhaust)...

I usually run 93 octane, sometimes 100

I would say 260ish. You have to understand when racing Camaro SS's and GT Mustangs that you have quite the weight advantage on them. So even if they are 300+ hp cars it doesn't take 300+hp on your end to keep up with them. Especially when you weight 500+ lbs less than they do. I think your car is probably quite fast, but my best guess would be about 260 hp or so. But than again dyno the car and find out.

alright... I'll let yall know when I can get it dyno'ed... thanks for the help...

oh, and when you guys are giving me your estimates, are you estimating crank hp or whp? (I'm assuming crank)

Wheel hp. Who gives a fuck about crank hp?

Wheel hp. Who gives a fuck about crank hp?

oh ok... that's probably where the difference is coming from... I was quoted from the crank... that's a/b right then... with a ~15% drivetrain loss, and 300 crank hp, that's 255 to the wheels...

makes a little more sense now...

you walk on camaro's with that setup? thats amazing. and STis? damn.
I know you have a tsi, but is it awd or fwd? (i only ask because i know some tsi's are front wheel drive...right?)

what do you guys think I have with my fwd setup?

I'm going to the track tomorrow, wednesdays they have open track, and im gonna run a couple times and see what happens. my problem is that i cant launch to save my life. Either i bog down too much or I peel out too much, or worse yet I ride the clutch for about 20 feet.

300 hp on a 14b pushing 16 pounds of boost? I cant imagine that much power with that set up. I would guess like 240-250.

I'd go a wee bit lower than that. 16lbs on a 14b? There just isn't enough airflow.

and whp is all that's worth talking about really.

Also, you can't judge 1/4 times by 1/8 times. It just doesn't work that well. The higher gears have a lot more load on the engine and it is MUCH MUCH more likely you will have timing / knock problems up top rather than just the 1/8

:1: he's right... more stress on the motor, more possible knock... thus, retarded timing... but you already knew that... lol

Wheel hp. Who gives a fuck about crank hp?
:werd:

lol their it goes agian... Always, almost every thread... ha ha

you walk on camaro's with that setup? thats amazing. and STis? damn.
I know you have a tsi, but is it awd or fwd? (i only ask because i know some tsi's are front wheel drive...right?)

what do you guys think I have with my fwd setup?

I'm going to the track tomorrow, wednesdays they have open track, and im gonna run a couple times and see what happens. my problem is that i cant launch to save my life. Either i bog down too much or I peel out too much, or worse yet I ride the clutch for about 20 feet.

my Tsi is FWD, and I walk on the Camaros (it was on interstate, he just couldn't keep up)... and the Sti I wasn't really walking on... it was a crawl at first, then he started to get away from me a little, but I can hang with him

I'd go a wee bit lower than that. 16lbs on a 14b? There just isn't enough airflow.

and whp is all that's worth talking about really.

Also, you can't judge 1/4 times by 1/8 times. It just doesn't work that well. The higher gears have a lot more load on the engine and it is MUCH MUCH more likely you will have timing / knock problems up top rather than just the 1/8

I haven't actually seen any knock... my AFC shows it's all clear, but then again I don't have a datalogger... those times are just from a 1/8 to 1/4 calculator... they're pretty generic... but a decent place to start when looking at possible 1/4 times...
there are no local 1/4 mile tracks...

With my spyder for sale, every single caller asked "how many HP are you putting down?" and "what is your 1/4?". I strictly stayed away from speculating, or extrapolating, due to the reasons many have already mentioned in this thread, and simply replied "more than 210 hp" and "faster than a stock GS-T Spyder" respectively. :p

With so many variants to take into account (driver ability, traction, boost, leaks, set-up, tuning, altitude, octane, etc), guesstimating figures can be way off than what reality may hold. You could be running a ton of boost with a huge turbo, and still be putting down something like only 230 hp.... several members can give testimoney to how bad tuning can lead to unexpectedly low hp gains, as compared to what the gains looked like on paper. This is why we usually frown on bench-racing (will my car beat my friend's car?) and what I call "on-line dynos" (I have X,X,X mods, what is my hp and 1/4 mile?).:2cents: :icon16:

With my spyder for sale, every single caller asked "how many HP are you putting down?" and "what is your 1/4?". I strictly stayed away from speculating, or extrapolating, due to the reasons many have already mentioned in this thread, and simply replied "more than 210 hp" and "faster than a stock GS-T Spyder" respectively. :p

With so many variants to take into account (driver ability, traction, boost, leaks, set-up, tuning, altitude, octane, etc), guesstimating figures can be way off than what reality may hold. You could be running a ton of boost with a huge turbo, and still be putting down something like only 230 hp.... several members can give testimoney to how bad tuning can lead to unexpectedly low hp gains, as compared to what the gains looked like on paper. This is why we usually frown on bench-racing (will my car beat my friend's car?) and what I call "on-line dynos" (I have X,X,X mods, what is my hp and 1/4 mile?).:2cents: :icon16:

true... I didn't mean to start anything... I was just kinda looking to see where I sat... I am still learning to drive this car... as the transmission is way different than the piece in the RS I had...

I'll let you guys know something when I get some solid numbers... I just wanna know if it's even worth the trip (~60 miles) to the dyno... I think I'll wait until I have a datalogger and possibly a 16G... maybe I'll get dyno's on both turbos...
lol, then I could pull up and flash the lower graph and talk smack... line up a race, then tell them that was before the turbo upgrade... lol ;)

Dyno runs are expensive...$100 a pop here in San Diego, CA. I would say hold on until you upgrade and tune further.

Dyno runs are expensive...$100 a pop here in San Diego, CA. I would say hold on until you upgrade and tune further.

I think I can get an hour (unlimited runs/tuning) for $150... that includes a wideband 02 in the tailpipe and hooking it to tuning computers/datalogging...

You really should have the wideband closer to the middle of the downpipe... I don't think its near as accurate if its clear in the back... Also, you really should have the datalogger to tune with the afc. How else are you reading knock and such to tune without one?

I'm not sure where they really put the o2 sensor... I can't even find the site that had the dyno info on it anymore... and I can't member for the life of me whom it was...

my dad's best friend owns a shop with a dyno... i can use it for free whenever i want (unles it's being used by a real customer) wish they would help tune it though... you got to pay for that...

my dad's best friend owns a shop with a dyno... i can use it for free whenever i want (unles it's being used by a real customer) wish they would help tune it though... you got to pay for that...

lucky bastard...
lol
I got friends with shops... custom 2.5" exhaust( turbo back), it cost me the cost of the pipe and that's all...

but no one around here has a dyno... ;(

Dyno runs are expensive...$100 a pop here in San Diego, CA. I would say hold on until you upgrade and tune further.

Unless you know where to go :) I got my Cobra dynoed for 40 bucks

Unless you know where to go :) I got my Cobra dynoed for 40 bucks


Really? Wow. The local dyno guy here said $100 a pop. When I asked about the $40-$60 runs, he said those were special prices at events only. Hmph. Shouldve gotten the spyder dynoed just for the heck of it.:rolleyes:

Unless you know where to go :) I got my Cobra dynoed for 40 bucks
Well, if you wouldn't mind... find me a shop in NC (close to Rocky Mount, or Wilson) to get my car dyno'ed... ;)

damn our shop is only $50 for a basic run.