my exhaust now sound ricey... kind of

[Fenvy]

I have had my s13 sr20det for a while... 2 years + already

last week I took the car in to install a few parts:turbo elbowfull race exhaust manifoldtomei 256 camshaftscrower springs and retainergarrett gt2871rapexi 1.1mm headgaskettoda flywheel 11lbdss driveshaft 11lbvarious oem seal/gaskets

now the exhaust is alot louder and higher pitched, almost ricey/fart can feeling

also the lightened rotation parts are over rated, I am not really impressed with the flywheel/driveshaft

of course, this is the initial feeling, I haven't been able to drive the car hard at all.

request for comments
Modified by Loveless at 12:47 AM 9/20/2006

[teddy]

I could see the turbo elbow making the exhaust slightly louder, but I can't see it changing the tone drastically. Did you make sure you don't have any exhaust leaks?

I don't think the camshafts would do much for the overall sound, except maybe for the idle. You might wanna just drive the car for a while and allow the new parts to break in. It may make a difference.

What kind of exhaust is on the car btw?

[Fenvy]

RSR ExMag

I forgot to mention I have a Full Race manifold too...

[S13FASTBACKSR]

yes im with teddy. you may just have an exhaust leak or maybe the parts just need to break in awhile. (manifold and o2 dump) those are what would change the sound a little IMO

[Fenvy]

other than the noise, it just takes a little more gas to get the car going. It is nothing harsh like some claimed with lightened flywheel, or maybe toda is less harsh?

I reconnect the boost controller, it feels like I lost some torque in low/mid range but eh the car seem to scream at high rpm 5k+. I am not sure if it is the camshafts since it is only 256 but the idle is sometimes a bit lumpy

motor is checked out between 145 and 150 compression

it's not bad of a feeling, I have high anticipation for this car once it is tuned

[karmakaze]

other than the noise, it just takes a little more gas to get the car going. It is nothing harsh like some claimed with lightened flywheel, or maybe toda is less harsh?

I reconnect the boost controller, it feels like I lost some torque in low/mid range but eh the car seem to scream at high rpm 5k+. I am not sure if it is the camshafts since it is only 256 but the idle is sometimes a bit lumpy

motor is checked out between 145 and 150 compression

it's not bad of a feeling, I have high anticipation for this car once it is tuned

i have a similar setup, except I have not lightened anything yet, and I went with the HKS 256in and 264out cams. I have an SSAC intercooler, greddy pipes, a Helix exhaust manifold, greddy o2 housing, 1.5mm head gasket, 60mm throttle body, freddy intake plenum, and a 4.36 VLSD.

Over stock, I def. didn't loose anything anywhere. I hit 17.5 psi a little before 4000RPM. My idle is a bit lumpy as well. Either turn up the Idle or deal with it is what I have heard. I would assume that it would stand true for your cams as well.

It does seem weird that your car doesn't scream until 5K. Mine really starts to pull a bit below 4000. you can really feel it when the gt2871r starts to get into its efficency range.

I am not taking the boost any higher until I install my greddy oil pan, RX7 oil cooler, and tune it a bit better. I have a lot planned for this engine when I swap it into my Kouki.

[Fenvy]

well my powerfc is not tuned so I am not doing any WOT, I put only like half a peddle so I am not hitting over 10psi. I am keeping a close eye on the knock so yeah... I don't want to blow anything up.

it's already damn loud so I imagine it might be worse when I get the car tuned and rev the damn thing to redline with WOT.

before I had cams/valve springs/retainer I shift at 7k, can I safely go up alittle now that I have cams/valve springs/retainer?

[karmakaze]

well my powerfc is not tuned so I am not doing any WOT, I put only like half a peddle so I am not hitting over 10psi. I am keeping a close eye on the knock so yeah... I don't want to blow anything up.

it's already damn loud so I imagine it might be worse when I get the car tuned and rev the damn thing to redline with WOT.

before I had cams/valve springs/retainer I shift at 7k, can I safely go up alittle now that I have cams/valve springs/retainer?

the redline on the s13 is 7500 anyway, so if you must, after some oil upgrades, a water pump pully, and RAS, i would say its probably safe to take it that high. but i would make sure not to go over.

on a side note, i have never understood why the redline on the s13 is 500rpm higher than the s14. any idea?

[BLACKHILLS13]

"now the exhaust is alot louder and higher pitched, almost ricey/fart can feeling"

My friend went to ss manifold/elbow, and there was little/no difference in sound & pitch. His was ceramic coated in/out. Maybe after a little carbon builds up, it'll quiet down. A little extra noise isn't a bad payoff if you've gained power..

[Fenvy]

on a side note, i have never understood why the redline on the s13 is 500rpm higher than the s14. any idea?

I remember somewhere it is to accomondate for the low port design and vvti

[karmakaze]

I remember somewhere it is to accomondate for the low port design and vvti

that does not make any sense though. the VVT disengages after about 2500 rpm, so why would it affect the redline?

correct me if i am wrong, but isn't the redline based off of the rotational mass off the engine and how fast it can spin before its own weight blows itself appart? most of the s13 and s14 sr20det parts being interchangeable with each other confuses me. shouldn't they have the same rotational mass regardless of the head port design?

[180fan]

Speculation: but maybe the engineers went conservative with the s14/s15 sr's with rocker arms flying off on folks holding high rpm for extended durations? I'd like to see what other ideas folks got on this though.

[karmakaze]

Speculation: but maybe the engineers went conservative with the s14/s15 sr's with rocker arms flying off on folks holding high rpm for extended durations? I'd like to see what other ideas folks got on this though.

that is sort of what I am speculating as well.

[Rosco]

Hmm....On my redtop I've bounced off the rev limiter plenty o' times....Mostly when doing burnouts and some wet conditions...

[HPR]

Sorry to get off topic. Where did you get your full race manifold from? Is it a top mount? Do you have any pictures? I've been looking for a full race w/ a T2 flange, but haven't had any luck.

[Fenvy]

http://full-race.com/

manifolds are built by order, from the date of ordering to receiving the product is like 6 weeks