Some SR20DET qustions

[BadBoy]

I will be buying a SR20DET in about a month hopefully.I have some qustions on what i will need.

1.Will i need to replace my fuel pump if not what addvantage's do useing a bigger one do.
2.What is a 3''test pipewhat dose it do.
3.Do i have to put in a electric fan.
4.Will the 3''down pipe mount right up to my stock Exhaust till I get a better one.
5.What is the differince between a blow off valve and a recurculeting valve (spelling might be off)Which is better.
6.Where can i get a  Hot Pipe for IC kit    

Thanks

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[tristarx]

<<1. Will i need to replace my fuel pump if not what addvantage's do useing a bigger one do.>>

You don't need to if you plan to run on stock boost level. Bigger ones comes into play when you want more HP (raising boost pressure, changing bigger turbo size) and making sure you have enough fuel pumping to your injectors.

<<2.What is a 3''test pipewhat dose it do.>>

It replaces your catalytic converter with a straight through pipe. &nbsp;Provides un-restricted exhaust flow which frees up more power, downside is you won't be able to pass smog. &nbsp;But since you are putting in a SR, you won't pass smog anyways.

<<3.Do i have to put in a electric fan.>>

If you bypass the stock fan clutch you will need somekind of high performance electric fan. &nbsp;

<<4.Will the 3''down pipe mount right up to my stock Exhaust till I get a better one.>>

All SR downpipe whether stock or aftermarket will connect to your catalytic converter.

<<5.What is the differince between a blow off valve and a recurculeting valve (spelling might be off)Which is better.>>

Recirculating valve is more like a bypass valve. &nbsp;Usually air flow is routed back into the intake track where a blow off valve often vent to the atmosphere, although for MAS equipped car like SR it's better you route the air back into the intake. &nbsp;The only blow off valve right now that allows you to route the vented air back into the intake is the Greddy Type-S.

Wayne
Phase 2

[BadBoy]

Also is there a web site other then heavy-throttle that has picture's of a sr20det swap into a s13.

Thanks

[Reklaw]

This is a really old post, but I had two questions regarding it. Both of them are regarding tristarx's comments

1. He claims that a 3" downpipe will connect to the stock cat-converter. Is this true or will I have to take it to a shop for them to "make it fit"?

4. I read in another post that the stock fuel pump will only support up to 200hp. If this is the case then will I see problems when I put my SR in next month if I'm running on the stock fuel pump? Yes, it's only 5hp difference if you look at the specs, but it's better to ask such things. Maybe someone has tried it.

Thanks!

[Jeff240sx]

Don't dig up old posts. Just start a new one.
Anyway.
The sr20det downpipe will bolt from the turbo to the 2nd cat (or fake cat) in every car. Nothin is needed to make it fit. If you have an NA car, it will bolt right up from the 2nd cat to the header. It's perfect.
Also... the fuel pump will support about 250rwhp. You will be fine with the sr20det swap pushing 205 flywheel hp, which usually dynos at 180rwhp or so.
I would not suggest keeping the stock pump in any way. If you are spending the $3k for the engine swap, please save yourself a blown motor and spend another $99 on a walbro pump.
-Jeff

[Reklaw]

Thank you Jeff240sx! Great information!

[Yoshi]

I know at least a couple people will back me up when I say
REPLACE YOUR STOCK FUEL PUMP.
I know of at least one person who killed his SR because the stock KA fuel pump leaned out and bad things happened. It's not worth risking your nice new (well, new to you) engine! Don't blow a wad of cash on something that inexpensive (comparitively).

on a side note, when I had a walbro, it was flowing a little too much, and I had to get a Tomei FPR for it... course, that was before the pump inexplicably died the next day :/

[lbcklik1486]

About recirculating the air back into the intake.. I've heard that it tends to make the car stall or sputter(if thats a real word) due to confusion of the ecu.

Also, couldn't you just tune your car to be very lean when you go for smog emissions?

[AceInHole]

Originally posted by Yoshi
I know at least a couple people will back me up when I say
REPLACE YOUR STOCK FUEL PUMP.
I know of at least one person who killed his SR because the stock KA fuel pump leaned out and bad things happened. It's not worth risking your nice new (well, new to you) engine! Don't blow a wad of cash on something that inexpensive (comparitively).

on a side note, when I had a walbro, it was flowing a little too much, and I had to get a Tomei FPR for it... course, that was before the pump inexplicably died the next day :/

that's weird... people have boosted up to like 11psi on the stock pump.... was he running more boost than stock?

[Jeff240sx]

Originally posted by lbcklik1486
About recirculating the air back into the intake.. I've heard that it tends to make the car stall or sputter(if thats a real word) due to confusion of the ecu.

Also, couldn't you just tune your car to be very lean when you go for smog emissions?

I don't know what you are talking about. If it's the BOV recirculation, you want it to get recirculated. If it isn't, it will cause stumbling and rich conditions.
-Jeff

[240Driver39]

i would think also with the stock fuel pump issue is that a lot of sr swaps that are done into older chassis that have fuel pumps that have been runnin for 100k or such and this would be a factor also leadin to possible failure...

[drift freaq]

Ok guys , time to clear up the fuel pump mystery and yes I have posted thhis before.
first off . For Ace's sake yes people have boosted 11lbs on stock injectors on a KA!! KA's run 270 injectors stock. SR's run 370's. The KA fuel pump was rated for 270 injectors not 370. Pushing the stock fuel pump at 7lbs of boost with 370 injectors will lean out your air fuel ratio drastically on a SR.
I personally did the compression test on the blown SR that Yoshi mentioned . the guy was running a stock fuel pump . He leaned out racing . #4 clyinder took it in the ring department . It came up with 50lbs vs 150 on the other 3 cylinders.

Plain and simple going SR put in the a fuel pump cheap insurance!!!