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Tuning FI
- Thread starter Mr.F
- Start date
snooplotty
Forum User
Mike,
I've had a look at what you said. Roughly how much are we talking about to do this?
I've had a look at what you said. Roughly how much are we talking about to do this?
Mr.F
Inactive
Assuming we are talking about the normally aspirated route of tuning:
Header and exhaust system: £330 (add approx. £150-200 for custom stainless system, £170 for jet-hot aluminised coating on header)
Induction kit approx. £150
Big Throat throttle body £275
FSE snap valve pressure regulator approx. £85
Cam kit (inc. springs, lash pads and followers) approx. £550
Head work £500 to £1000......
Improve flow in manifold / port match to head.....
Additions to consider - uprated clutch, uprated fuel pump, uprated fuel filter, oil cooler kit, electric fan kit, custom engine build for compression.
By this time we are into scrapping the 280ZX ECU and injectors and fitting a custom, programmable system:
Custom ECU £600 to £2000
Uprated injectors from £75 each
Redesign fuel system........
Add nitrous oxide injection kit......
Header and exhaust system: £330 (add approx. £150-200 for custom stainless system, £170 for jet-hot aluminised coating on header)
Induction kit approx. £150
Big Throat throttle body £275
FSE snap valve pressure regulator approx. £85
Cam kit (inc. springs, lash pads and followers) approx. £550
Head work £500 to £1000......
Improve flow in manifold / port match to head.....
Additions to consider - uprated clutch, uprated fuel pump, uprated fuel filter, oil cooler kit, electric fan kit, custom engine build for compression.
By this time we are into scrapping the 280ZX ECU and injectors and fitting a custom, programmable system:
Custom ECU £600 to £2000
Uprated injectors from £75 each
Redesign fuel system........
Add nitrous oxide injection kit......
zedhead260
Well-Known Forum User
....................junk the FI and fit some carbs !!!
STEVE BURNS
Club Member
Mike
Now I know why when I posted asking of costs in the lengthy thread in "upgrade options for a L28 with FI" in the "240/260/280Z" section back at the end of March you replied "if you need to ask its to expensive"
If you need to see this thread click on relevant buttons to open section and then click on from the beginning and then click GO at the bottom of the page and all posts in this section will be listed or use the search button
Now I know why when I posted asking of costs in the lengthy thread in "upgrade options for a L28 with FI" in the "240/260/280Z" section back at the end of March you replied "if you need to ask its to expensive"
If you need to see this thread click on relevant buttons to open section and then click on from the beginning and then click GO at the bottom of the page and all posts in this section will be listed or use the search button
Mr.F
Inactive
Sorry, forgot to add: if you want to get really expensive, let's junk the whole 280ZX FI manifold, buy a triple carb manifold and a set of three twin throttle bodies (preferably the new roller vane type), couple with suitably sized injectors and programmable ECU, all the head tricks known to Z-kind, a maxed out cam.....then go kick some carburetted butt.
Oh, BYW, do it in a 2 seater 280ZX to minimise the weight disadvantage that you'll be starting with, strip to the bare minimum, uprate to 3.9:1 diff at least (with LSD of course) and try to make those swinging arms on the rear suspension make some semblance of traction.....
Oh, what the hell - stick the whole lot in a lightweight 240Z shell and have done with it.....
Oh, BYW, do it in a 2 seater 280ZX to minimise the weight disadvantage that you'll be starting with, strip to the bare minimum, uprate to 3.9:1 diff at least (with LSD of course) and try to make those swinging arms on the rear suspension make some semblance of traction.....
Oh, what the hell - stick the whole lot in a lightweight 240Z shell and have done with it.....
snooplotty
Forum User
mike,
cheers (i think!<img src="http://www.zclub.net/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt='
'>
cheers (i think!<img src="http://www.zclub.net/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt='
'>
Mr.G
Club Member
Ok, it is expensive (Mike, thanks for all that info).
Mike can you give us a Stillen Stage type recipe route, so ones budget can accomodate the mods over time. <img src="http://www.zclub.net/iB_html/non-cgi/emoticons/biggrin.gif" border="0" valign="absmiddle" alt=''>
I doubt stage 1 would be just header and manifold as I've heard that by just doing that it doesnt improve anything. I guess it would start with simpler mods such as Air induction, performance exhaust without the header etc...
It would be a great help and inspiration if you could write somthing up like that with all the stages.
thanks,
George.
Mike can you give us a Stillen Stage type recipe route, so ones budget can accomodate the mods over time. <img src="http://www.zclub.net/iB_html/non-cgi/emoticons/biggrin.gif" border="0" valign="absmiddle" alt='
'>I doubt stage 1 would be just header and manifold as I've heard that by just doing that it doesnt improve anything. I guess it would start with simpler mods such as Air induction, performance exhaust without the header etc...
It would be a great help and inspiration if you could write somthing up like that with all the stages.
thanks,
George.
Mr.F
Inactive
OK - no hard and fast rules here, but my "best guess" is that it will go this way:
1. Air induction kit - even taking the top off the standard airbox will make horsepower, but I wouldn't recommend it long term. 3-5 BHP
2. Power boost valve to improve throttle response - no real horsepower gain.
3. I think header plus exhaust is an important early step and would disagree with anyone who says no improvement. Important that you don't take too much back pressure out of the system. Not too big on the header primaries unless you are going all out later.... Maybe 15 BHP.
4. Big throat throttle body - claimed gain 0.5 of a second off your 0-60 time on its own, so could be a good stage 1. Claimed 9% increase in BHP. Make sure the manifold is ground out to match the new big butterfly opening! Should be at about 180-190 BHP on a stock 2.8 by now?
5. Some have claimed improvements from gas flowing the intake manifold - do it now if you are going to bother and port match to the cylinder head. Probably 3-4 BHP at best?
6. Cylinder head off, gas flowed, ported etc. Fit a Stage 2 cam now and call it a day with the standard injection or fit the Stage of your choice if you plan to junk the Nissan ECU and go programmable.....Even at Stage 2, with head mods you may run into problems with the stock ECU and stock injectors. Beware lean running and detonation. Just over 200 BHP should be achievable.
7. Programmable ECU, bigger injectors, more cam - now limited by the stock intake manifold.
8. Aftermarket injection throttle bodies on a Weber type manifold. Now you can rip the engine apart, fit the billet stroker crank, custom pistons, upgrade practically everything you've done so far and try for 300 BHP....
1. Air induction kit - even taking the top off the standard airbox will make horsepower, but I wouldn't recommend it long term. 3-5 BHP
2. Power boost valve to improve throttle response - no real horsepower gain.
3. I think header plus exhaust is an important early step and would disagree with anyone who says no improvement. Important that you don't take too much back pressure out of the system. Not too big on the header primaries unless you are going all out later.... Maybe 15 BHP.
4. Big throat throttle body - claimed gain 0.5 of a second off your 0-60 time on its own, so could be a good stage 1. Claimed 9% increase in BHP. Make sure the manifold is ground out to match the new big butterfly opening! Should be at about 180-190 BHP on a stock 2.8 by now?
5. Some have claimed improvements from gas flowing the intake manifold - do it now if you are going to bother and port match to the cylinder head. Probably 3-4 BHP at best?
6. Cylinder head off, gas flowed, ported etc. Fit a Stage 2 cam now and call it a day with the standard injection or fit the Stage of your choice if you plan to junk the Nissan ECU and go programmable.....Even at Stage 2, with head mods you may run into problems with the stock ECU and stock injectors. Beware lean running and detonation. Just over 200 BHP should be achievable.
7. Programmable ECU, bigger injectors, more cam - now limited by the stock intake manifold.
8. Aftermarket injection throttle bodies on a Weber type manifold. Now you can rip the engine apart, fit the billet stroker crank, custom pistons, upgrade practically everything you've done so far and try for 300 BHP....
STEVE BURNS
Club Member
has anybody done any of Mikes sugestions in the last few months and if so do figures compare
Mr.F
Inactive
Zaim Mohammed got to Stage 4 on his 280ZX 2 seater and improved the quarter mile time from a typical standard car's 17.0 seconds to a best of 15.4 seconds. Rolling road figures showed the estimated equivalent of 190 bhp at the flywheel - the same as Janspeed claimed for their basic turbo installation. However, most standard Janspeed turbos I have had experience of are not as responsive low down as his car was. 17.0 dead on the quarter mile calculates to 109 rear wheel bhp and 15.4 calculates to 149 bhp, ie. about a 40 bhp improvement.
I talk in the past tense about Zaim's car, as it was stolen in Glasgow and discovered after a couple of days completely burnt out. A sad loss to the ranks of quality 280ZX 2 seaters.
The calculation to work out rear wheel horsepower from a drag strip elapsed time is:
weight(lbs) x 200 /E.T cubed
I have assumed a basic weight for a 280ZX 2 seater of 2700lbs (probably more, which would enhance the horsepower figures).
I talk in the past tense about Zaim's car, as it was stolen in Glasgow and discovered after a couple of days completely burnt out. A sad loss to the ranks of quality 280ZX 2 seaters.
The calculation to work out rear wheel horsepower from a drag strip elapsed time is:
weight(lbs) x 200 /E.T cubed
I have assumed a basic weight for a 280ZX 2 seater of 2700lbs (probably more, which would enhance the horsepower figures).