Very Confused

[turbotoyota]

My 91 turbo had been running 15.1's at low 90's in the 1/4 mile with a 2.0 60'. Everyone say's that these cars run 14.6 stock, so I figure I'm missing some power. Well I took the car to the dyno to take a look at the A/F ratio, and to my surprise, the car made 188hp and 200lb-ft of torque. So now I'm thinking I'm just a bad driver, and have my dad drive the car. Same results. Like I said, a 2.0 60', redline first and shift at 5500 for the other gears. One thing that was different when I did the dyno run, was that the car had Gumout in the gas tank. I don't think that this acts as an octane booster, but now I am not sure. I don't have any extra weight in the car from an audio system or anything like that. One thing that I noticed, was that on the sticker in the driver side door, the car is rated at weighing 3370lbs.. I've heard that they were 2800lbs.. This car is a 91 with T-tops, full leather interior,and factory limited-slip. Could my car weigh more than other's, or is this the normal performance that I can expect? Any help would be appreciated because I am very confused.

[ac427cpe]

It could be weight, or tires, or your oil, or clutch, worn out cap and rotor..... a lot of things could be taking power, or not allowing it to get to the ground.

what have you done to the car in terms of upgrades?

[turbotoyota]

Upgrades include HKS exhaust, K&N filter, GReddy intercooler and boost controller set at 14 psi. I bought a new cap, rotor, wires, and fuel filter from toyota about 7,000 mi. ago. The plugs are new, and are the NGK BKR7E. Wheels are 17 in. enkei EVO 5's with BFGoodrich G-Force Sport tires. There is no audio system or bodykit or anything to add weight to the car. The car made 188hp yet it run's slower than a stock MR2 should run. With a 2.0 60', I would assume that the clutch is fine. Suspension is fine, besides, I think a worn out suspension would actually help at the drag strip, as it would allow the car to squat on take off. Like I said, the only difference in the car during the dyno run, was the Gumout in the gas tank. I have not ran the car down the strip since the dyno run or since putting Gumout in the tank, but I don't think the Gumout made a difference since it cleans, and is not an octane booster. Also the car did not feel any stronger with the Gumout.

[mr2envy]

wow that sucks also that 14.6 is 14.7 and its by pros so dont feel bad do you have full exhaust or just a muffler or a tip? the 17s will rob u a bit you can launch at higher rpms but itll slow u down for sure they came with stock i think 15s mabey 14s. quisten how do you have stock limitied slip? as far as i know that didnt come on usdm mr2s till 93... or am i wrong?

[turbotoyota]

The exhaust is the HKS Hi-Power exhaust which goes from the primary cat back, and eleminates the secondary cat. Yeah my 91 came with 14 in. wheels, but even with those it ran the same times. I think in 91 and 92 few mr2's came with limited slip, and then, in 93, it became standard. Also, I know it has limited slip because that's what the burn out marks on my garage floor tell me.

[TRD2000]

targa tops ARE heavier..... roof's heavier and there's extra bracing to stiffen them up. leather and options are also heavier. and i wonder how much dirt is under the carpet after all these years?

also... what sort of Dyno? some read higher than others....

[turbotoyota]

The dyno used was a Dynojet.

[mr2envy]

i guess theres just that big of a difference from professional drivers and amatuers sorry buddy

[turbotoyota]

Well, that's what it looks like. Also, does anybody know if Gumout acts as an octane booster, and what the stock boost is because on low boost, the car does not pull at all. I think the highest I've seen in low boost was 8.4psi..

[turbotoyota]

I just bought an HKS VPC and was wondering if I am going to need to have the car dyno tuned after installing it, or, if I can buy a chip from HKS for my specific mods, and run the car like that with no problems.

[HondaChili]

hmmm 188 hp at 14.5psi , correct if i'm wrong but doesn't that seem abit low with the mods he has on? I know i haven't been in an MR2 for a while but i remmeber making more power than that with those same mods. I also agree with envy that the pros drive the cars way better than us common folks. Can't expect to pull out a 13.5 with a stock STI unless you have tried so many many times. Plus there are too many discrepancies in the euqation. Temperature, altitude, mechanical malfunction, driver error all play a role in running times. It is too hard to exactly pin point the source.

BTW: Wassup DAN, and Jekly and hyde. Long time no see, how are things? I am currently ghosting on AF so ill be dropping in and out. Sorry to half hi-jack this thread but i figured it was better than starting a new one.

[JekylandHyde]

turbotoyota, the weight rating on teh door is how much the car can carry totla if you load it up (passengers, luggage, etc).

The turbo MR2 weighs around 2800-2950 lbs.

Your 2.0 in the 60' is an average launch, not a great one.
If you would nail a 1.8, like a pro driver, you would be right down to 14.6-14.7.

The car is rated for 14.7-14.8 stock.

You said your car is a 91 with sotck LSD, there is no such thing unless you added it. LSd was not an option on the MR2 until 1993.

[JekylandHyde]

Originally Posted by HondaChili

BTW: Wassup DAN, and Jekly and hyde. Long time no see, how are things?

Good ... can't complain much.
Well over 550 rwhp now ... just wish I could stop.

[turbotoyota]

Sorry about the wrong information on the lsd. I can't remember where I got it from but it made sense to me because my car pulls with both tires. So I guess a previous owner had it installed.

[JekylandHyde]

Originally Posted by turbotoyota

... I got it from but it made sense to me because my car pulls with both tires. So I guess a previous owner had it installed.

All MR2s pull with wheels. It is completely possible to lay dual burnouts tracks with an open0diff MR2.