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Gtir Motorsport club » General Discusion » Gtir related Discussion » What hp?

What hp?

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1 What hp? on 28th January 2017, 5:30 pm

Stu

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I know I will need to get the car on the rollers at some point.
I plan to soon.
Once the car has been painted and I have sorted a few things out..

What bhp do you think I will get at 1.2bar with this setup.
Forged engine (standards size pistons)
Dp tubular manifold
Custom turbo elbow
Gt2871rs turbo with external wastegate
Hiteq relocation pipe
Hks mushroom filter
Evo 560cc injectors
5zigen exhaust 2 & 3/4 bore
Lightened and balanced flywheel
Ally crank pulley
Ecu with daughter board, generic 1.2bar map
Standard afm

I'm guessing 330hp to 340hp

Should I get a z32 afm, r34 afm or Q45 afm?
I won't be looking to run any more boost than 1.2bar.


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2 Re: What hp? on 28th January 2017, 5:50 pm

PartyPete

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340 is my guess

3 Re: What hp? on 28th January 2017, 7:28 pm

Cosmic73

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Yeah, 330 easy Very Happy

4 Re: What hp? on 28th January 2017, 8:56 pm

nomad

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Q45 maf seem quite cheap so would be a better option cost wise .... 30-40 quid .... and plugs for 12 quid ish .... not sure on tuning compared to the z32' s etc .... i would guess 330 on a standard maf ....


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5 Re: What hp? on 28th January 2017, 9:05 pm

Stu

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Thanks for the replies.
I think the Q45 afm doesn't allow you to run as much hp as a z32 but for upto 340hp I think it's more than enough.

Think I'm going to see what it's like with the standard afm first and then go from there.


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6 Re: What hp? on 28th January 2017, 10:23 pm

johnny gtir

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I thought the Q45 did not suit the V range of our cars and not as good as the z32 for the Stable tick over?
They Worked best on a fully mappable stand alone or can they be altered on a daughter board ?

7 Re: What hp? on 28th January 2017, 10:40 pm

nomad

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Not sure ive seen a q45 on a pulsar before cant remember what bhp it was running or anything
... they come of a 4.5 litre v8 so would of thought it would handle 400bhp ....


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8 Re: What hp? on 28th January 2017, 10:45 pm

nomad

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Just having a read up apparently the q45 can handle 550-600 bhp so dont think thats the issue the z32 is meant to be easier to tune than the q45 .....


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9 Re: What hp? on 28th January 2017, 10:55 pm

Stu

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Thanks Leighton.
Guess I need to do some research.
Or just stay standard afm and see what it's like lol


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10 Re: What hp? on 28th January 2017, 10:55 pm

Stu

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@johnny gtir wrote:I thought the Q45 did not suit the V range of our cars and not as good as the z32 for the Stable tick over?
They Worked best on a fully mappable stand alone or can they be altered on a daughter board ?
I have no idea mate.


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11 Re: What hp? on 28th January 2017, 11:18 pm

johnny gtir

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From what I can find it's ok upto around 400ish
It's 90mm diameter
Reason it's less common is some Ecu don't support it but power fc dose for example
If the Ecu dose not you have to create your own airflow pattern
It can be less stable than a z32 hence less commonly used on the sr20
And as always to contradict all that above also found a fair few using it with no issues but they say about 400 ish is it's limit
I personally remember buying one as thought it was cheap when I first got into pulsars i was told it was more hassle to tuners and something about voltage that's why I sold it bought a z32 then about 2 year later a few people rated q45 used them and a few bought them due to been cheaper

12 Re: What hp? on 28th January 2017, 11:26 pm

Gostek

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Once I'll get my forged engine in (if ever....) I'm planing to get one of those and do maf to map conversion. I've heard some good thing about it and it cost just tad more than z32 maf

http://www.ecumaster.co.uk/products/digital-ecu-tuner-3

Just wouldn't put it on a top of daughter board....


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13 Re: What hp? on 29th January 2017, 12:22 am

Stu

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Thanks guys.
I'm gonna stay away from afm upgrade.


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14 Re: What hp? on 29th January 2017, 9:28 am

nomad

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I would say its probably the only thing holding you back with all the other supporting mods you have nate ..


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15 Re: What hp? on 30th January 2017, 6:05 pm

pulsarmoley

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Id say the 330/340hp is about right but im assuming no more without upgrading the afm?
Why have you gone for an alloy crank pulley Stu?


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16 Re: What hp? on 30th January 2017, 6:29 pm

Stu

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@pulsarmoley wrote:Id say the 330/340hp is about right but im assuming no more without upgrading the afm?
Why have you gone for an alloy crank pulley Stu?
It was already on the engine when I first bought the car mate.


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17 Re: What hp? on 30th January 2017, 11:19 pm

GTI-R US

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If its a generic mapped ecu board then by fitting a larger maf it may not fuel correctly if you have no access to altet the map.
Best thing to do is get it on rollers and see what boost you can safely run and also how it runs with a larger maf fitted.

You qint get more than 340 with the stock maf and thats assuming its functioning correctly, think if i were you i would try a GTR35 maf on it as they have scope to read a far greater airflow.

The car will still run more than 340 on stock maf but the issue is that it simply can not calculate the volume of air flowing through it so then the ecu plays a kind of guessing game as the readings it recieves from maf will be inacurate which is when things become either way too rich or lean at certain points in the generic map which has been loaded

Hope that kind of makes sense to you confused


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18 Re: What hp? on 31st January 2017, 12:02 am

Stu

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Thanks Bob.
I'm going to just fit the ecu and then speak to you about bringing the car down.
Will be a while yet tho and you are probably fully booked for a while anyway.


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19 Re: What hp? on 31st January 2017, 6:54 am

Mr B

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If generic map has the bigger injectors been included in current daughterboard chips .
If not being greedy on power and aiming around 330 to 400 then piggyback controller on standard ecu good way go as get best of nissan mapping (cold start/idling etc) and ability fine tune ignition and fueling to suit any parts upgrades you need pending on power level. anywhere from 300 to 350 is pretty easy when all healthy and working well. beyond this airflow, injectors, mapping control and good boost control start playing big roles .

20 Re: What hp? on 31st January 2017, 1:52 pm

Stu

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Thanks B.
The ecu turned up today and I don't think it has a generic map on it because it is struggling to idle.
Keeps stalling and then the revs go upto 150 rpm and down to 400 rpm and then it stalls again.
Think I need to get the ecu sent off and check the map..


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21 Re: What hp? on 31st January 2017, 6:32 pm

johnny gtir

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What Ecu is it Stu ? Ie what chip is in it ?

22 Re: What hp? on 31st January 2017, 7:09 pm

Stu

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@johnny gtir wrote:What Ecu is it Stu ? Ie what chip is in it ?
Eprom chips.

I read up on them on here.
Someone else had the same daughter board and chips..


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23 Re: What hp? on 31st January 2017, 7:14 pm

Stu

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24 Re: What hp? on 31st January 2017, 8:17 pm

johnny gtir

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I have a Ecu with similar chips in mate i think thread somewhere with was it Dave watoga who used to know a lot about Ecu's

25 Re: What hp? on 31st January 2017, 8:21 pm

Stu

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@johnny gtir wrote:I have a Ecu with similar chips in mate i think thread somewhere with was it Dave watoga who used to know a lot about Ecu's
Yes that's the one mate.
I was gonna ask Bob if he was able to read ecus or not. See what the map was like..
Not sure what to do to be honest tho.


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