Boosted but slower than stock!

[CamryOnBronze]

4 psi is the stock boost for the trd supercharger... Id say 50 hp is a worthwhile investment...

[ProRally Codriver]

4 psi is the stock boost for the trd supercharger... Id say 50 hp is a worthwhile investment...

You'd think so till any turbo 4 cylinders with gobs more boost smoke you. Capow, cachow. Then you'd be wanting a turbo instead.

[Paladin06Greg]

[Dawgz]

8)

whats that for?

[Warlord]

Probably because he's running a good 10psi and has 320WHP...I'm guessing he doesn't want a turbo 4cyl...or maybe he's just a happy guy.

[CamryOnBronze]

4 psi is the stock boost for the trd supercharger... Id say 50 hp is a worthwhile investment...

You'd think so till any turbo 4 cylinders with gobs more boost smoke you. Capow, cachow. Then you'd be wanting a turbo instead.

I had a 4 cylinder, trust me... I dont want another one. If I was out to have a cheap, easy, fast four banger ricer car I would have bought a honda.

[Paladin06Greg]

Happy where I am, finally.

[Dawgz]

for the time being, before i go get a compression test and wat not, the ecu plugs/connectors were unplugged to solder thw SAFC wires into, basically the ecu would be reset then. the first run was with the ecu fully reset and wat not.


Would that contribute to the low hp/torque? or would reseting the ecu be to minimal of a change to notice like that?

[Eye8Pussies]

the reset would be pretty minimal....


post your graphs w/ the afrs and let us take a look...

[Dawgz]

I couldnt get access to a scanner, so i took a pic of it, haha...it came out iite.







O, also, i had them connect the purple wire (knock sensor wire from safc) to the rear knock sensor, durring the runs, the knock sensor gave out NO knock.

[Eye8Pussies]

yeah, I took a look at the link that you sent me as well...

and as from the graph, there is no knock sensor problems for sure (confirmed by the safc knock sensor alarm), so that's one thing that's for sure not a problem.

moving on, I would say that you will have to check for everything that prorally mentioned- plugs, compression, wires, etc. Even if they are brand new, it's time to double check.

What plugs are you running again? And are you sure that you're running 3psi of boost? those gains could be from 1psi of boost....just speculating....

[Dawgz]

yeah, I took a look at the link that you sent me as well...

and as from the graph, there is no knock sensor problems for sure (confirmed by the safc knock sensor alarm), so that's one thing that's for sure not a problem.

moving on, I would say that you will have to check for everything that prorally mentioned- plugs, compression, wires, etc. Even if they are brand new, it's time to double check.

What plugs are you running again? And are you sure that you're running 3psi of boost? those gains could be from 1psi of boost....just speculating....

i have NGK Iridium ix Spark plugs and Magnecore 8.5mm wires.


My boost gauge reads 3-4psi, so its probably not @ 1psi.

[Jon11582]

I said this before on IM but I didnt want to mention it on the forums because I do not have any experience with boost. it seems like its at a point where people are just making baseless suggestions, so I'll do the same.

Strictly looking at the graph, it seems like the max torque is reasonable for a 4psi pull on an auto (185 ft/lbs @ ~4000RPM), but it is dropping off way too quickly. Most of the S/Ced dyno'ed Solara graphs Ive seen hit the max HP around 6000 RPM. But he hits it at 5250. Officially, the SC'ed 1MZ hits max torque at 4000RPM and max HP at 6000RPM.

This also tells me that the extra torque from the boost is there, its just not staying as strong through the higher RPM range as it should. It just crashes unusually fast after 4500rpm. The other Dyno graphs I've seen here at stock boost have a much less dramatic decline in torque after 4500RPM, and show around 160 ft/lbs at 6K, yet this ones struggling to keep 130 ft/lbs @ 6K.

I don't know what that means, but maybe this will mean something to someone.

And for the plugs - the Iridium IX's come in warm, normal, and cold spark.
BKR6EIX-11 is the standard. BKR7EIX-11 is the cold spark.

[ProRally Codriver]

Yep, no power in higher RPMs. many things would cause that so difficult to cyber-speculate cause. Would still check the list I posted. You can buy your own compression tester from any auto parts store for less than most shops will charge you to test. Pretty simple.

If all tested OK, I'd swap in larger injectors and tune again before any exhaust mods. Headers and Y pipe will help but not drastically until you modify cylinder heads. Swapping out cat or running test pipe will make no noticable difference (~1 hp) unless your current cat is toast inside and clogging flow. Not worth having your car impounded if caught onstreet w/o cat.

[Paladin06Greg]

Did I miss the part about how many miles on the car?