madkaw Posted August 1, 2017 Share Posted August 1, 2017 Here's what I have: 1978 280z Rebello Racing 3.2L Stroker N42 block N42 head Ported stock intake 360CC Injectors 60mm throtlebody Pace Setter header 3-2-1 Adaptronics ECU Z32 Trans (Hoke Adapter) Infinity Diff 3:69 T3 Susp. Impressive especially NA with a nearly stock induction. Who says you can't get any power from a N42 intake. You could only get maybe 32mm runner ID? Quote Link to comment Share on other sites More sharing options...
harlest Posted August 1, 2017 Share Posted August 1, 2017 Impressive especially NA with a nearly stock induction. Who says you can't get any power from a N42 intake. You could only get maybe 32mm runner ID? Thanks madkaw! Rebello wanted to do the triple weber setup, which would have given me about 50 more hp but I just wanted the fuel injection. I don't remember what the ID was but they did cut the intake wide open to do it. Quote Link to comment Share on other sites More sharing options...
madkaw Posted August 1, 2017 Share Posted August 1, 2017 Get a custom intake with a bigger plenum and runners !!! Running a n42 now on my little L24, but building a bigger plenum . Can't get very big with N42, not enough meat there Quote Link to comment Share on other sites More sharing options...
supernova_6969 Posted August 1, 2017 Author Share Posted August 1, 2017 madkaw: Wouldn't longer runner steal some of the low end torque? (Or is it the opposite?) As for the bigger plenum, what are the advantages? Is it because it's simply a bigger container from which the pistons can "suck" from or are there other advantages? Wouldn't having a efficient (i.e. less restriction) pre-plenum system make up for that? Got a build thread or some photos of what you are building? Quote Link to comment Share on other sites More sharing options...
harlest Posted August 1, 2017 Share Posted August 1, 2017 I thought the longer the runner the better the low in torque. Quote Link to comment Share on other sites More sharing options...
turbogrill Posted August 1, 2017 Share Posted August 1, 2017 Are these crank or wheel? Quote Link to comment Share on other sites More sharing options...
ryant67 Posted August 1, 2017 Share Posted August 1, 2017 Rebello's numbers are crank. Quote Link to comment Share on other sites More sharing options...
turbogrill Posted August 1, 2017 Share Posted August 1, 2017 Would this engine pass emissions? The Porsche 996 (M96) engine makes similar power at same rpm. But its a 3.4. (and expensive) Quote Link to comment Share on other sites More sharing options...
harlest Posted August 2, 2017 Share Posted August 2, 2017 Are these crank or wheel? This is crank. I wish it was at the wheel. Would this engine pass emissions? The Porsche 996 (M96) engine makes similar power at same rpm. But its a 3.4. (and expensive) I'm not sure they don't check that to much here. YET! Get a custom intake with a bigger plenum and runners !!! Running a n42 now on my little L24, but building a bigger plenum . Can't get very big with N42, not enough meat there I'd like to get a custom intake but I'm not sure if it's worth the money. Are their a lot of shops making Z intakes? Quote Link to comment Share on other sites More sharing options...
Chickenman Posted August 2, 2017 Share Posted August 2, 2017 A lot of shops making Z intakes? L-series not very many at all, and some of the Manifolds were junk. Now these guys make serious stuff and can make anything your little heart desires. Serious kit and serious $$$. Drool is free however... https://www.facebook.com/customplenumcreations Quote Link to comment Share on other sites More sharing options...
theczechone Posted August 2, 2017 Share Posted August 2, 2017 (edited) Going with an ITB setup from Jenvey or EFIHardware should yield the same results as the webers and give you the reliability/tunability of EFI probably looking at just under 2k in induction after it's all set and done not that much different than webers or mikunis. ***TWM is also an option Edited August 2, 2017 by theczechone Quote Link to comment Share on other sites More sharing options...
harlest Posted August 2, 2017 Share Posted August 2, 2017 A lot of shops making Z intakes? L-series not very many at all, and some of the Manifolds were junk. Now these guys make serious stuff and can make anything your little heart desires. Serious kit and serious $$$. Drool is free however... I wonder what the cost is on that intake it looks great!!! Drool is the word to describe it. Going with an ITB setup from Jenvey or EFIHardware should yield the same results as the webers and give you the reliability/tunability of EFI probably looking at just under 2k in induction after it's all set and done not that much different than webers or mikunis. ***TWM is also an option I would like to see some dyno sheets from the ITB setup. That is something i would consider. However I do love that intake above. Quote Link to comment Share on other sites More sharing options...
HowlerMonkey Posted August 2, 2017 Share Posted August 2, 2017 The reason a stock type intake can make so much horsepower is that it is feeding all six cylinders while we have a single SU for each 3 cylinders or one venturi per cylinder for triples. We've known this for many years in improved touring but the downside is that you can only run the injection intake on a car 1975 or newer meaning at least 200 pounds heavier as per the rules as well as having to run a cylinder head/piston/cam combination not nearly as radical as what was available for early 240z. I feel a well sorted F54/flat tops with a P90 head optimized for normally aspirated running with best stock injection intake could make great power depending on how much you shave the head for the sake of compression ratio. Has anybody tried the LD28 intake on a hot built N/A engine? Quote Link to comment Share on other sites More sharing options...
madkaw Posted August 2, 2017 Share Posted August 2, 2017 The reason a stock type intake can make so much horsepower is that it is feeding all six cylinders while we have a single SU for each 3 cylinders or one venturi per cylinder for triples. We've known this for many years in improved touring but the downside is that you can only run the injection intake on a car 1975 or newer meaning at least 200 pounds heavier as per the rules as well as having to run a cylinder head/piston/cam combination not nearly as radical as what was available for early 240z. I feel a well sorted F54/flat tops with a P90 head optimized for normally aspirated running with best stock injection intake could make great power depending on how much you shave the head for the sake of compression ratio. Has anybody tried the LD28 intake on a hot built N/A engine? On the list Quote Link to comment Share on other sites More sharing options...
harlest Posted August 3, 2017 Share Posted August 3, 2017 I would love to see what numbers that intake puts up!!! That thing is crazy looking. Any idea what the runner ID is? Throttle body ID? Quote Link to comment Share on other sites More sharing options...
madkaw Posted August 3, 2017 Share Posted August 3, 2017 Runners are 35mm and TB could be whatever Quote Link to comment Share on other sites More sharing options...
HowlerMonkey Posted August 3, 2017 Share Posted August 3, 2017 (edited) I have one as well and considering just a short rubber coupler going to a throttle body with cable actuation. I guess two throttle body back to back with plate removed out of one would be super easy but likely look pretty ghetto. I think 60mm TB is as big as one should go since I've driven a super responsive n/a l28 with the Q45 throttle body and found modulating it at low throttle openings difficult since you need very little throttle angle to greatly effect power production. I mean...........the toyota GTP car made 800+hp with a 54mm restrictor and bob lentz's gt2 350z makes north of 380hp with a 30mm restrictor on a normally aspirated vq engine. Edited August 4, 2017 by HowlerMonkey Quote Link to comment Share on other sites More sharing options...
madkaw Posted August 3, 2017 Share Posted August 3, 2017 I considered the coupler idea also - to get the TB in a reasonable placement for linkage and hood clearance . Fuel rail will be tight. I might just use n47 intake flange and adapt it Quote Link to comment Share on other sites More sharing options...
joey.youssef Posted August 3, 2017 Share Posted August 3, 2017 Dyno graph.jpg L28 87.5mm bore 79mm stroke 2850cc's JE 300zxtt forged pistons, custom rods RSR 1.72 Australian delivered late model E88 head. CNC ported flowed stainless 44mm/35mm valves 300 degree 590 lift camshaft 10 to 1 compression 98 octane unleaded petrol (pump grade) Clifford 6=8 four barrel manifold Injection Perfection 1000cfm four barrel throttle body 280 zx distributor locked @ 30 degrees MS2 3.5.7 Ebay generic headers 3 inch pipe Varex muffler It's that induction man.......that's where the power is. (oh, and the head,,,and cam. lol) Do you have the flow numbers of your ported head? Quote Link to comment Share on other sites More sharing options...
Nismospek Posted January 11, 2018 Share Posted January 11, 2018 Just had my baseline dyno Stock N42 head, have to verify block next time I am underneath the car. Dual SUs Motorsport 6 to 1 Header 2.5 inch exhaust At altitude 5869 ft. Quote Link to comment Share on other sites More sharing options...
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