Luke350 Posted November 16, 2015 Posted November 16, 2015 (edited) Hi all. I'm quite happy with standard exhaust on my HR and standard induction too. The one thing I think lets the HR Down is only having that extra horsepower so far up the Rev range. Would a uprev on a standard HR be able to bring the power further down the Rev range? So I'm not having to be in the 60s to get the most out of 2nd gear? Sent from my iPhone using Tapatalk Edited November 16, 2015 by Luke350 Quote
Bodyboarder81 Posted November 16, 2015 Posted November 16, 2015 Not really mate Look into changing your final drive gear . Quote
ZEUS Posted November 16, 2015 Posted November 16, 2015 If you mean UpRev then I wouldn't waste your money on it. Quote
Richf Posted November 16, 2015 Posted November 16, 2015 I believe the stock maps limits throttle openings below 60 mph or maybe its just in 1st and 2nd so uprev can correct that , it wont make much difference to the hp or the 0-60 time though Quote
Tricky-Ricky Posted November 16, 2015 Posted November 16, 2015 If the HR still has the std throttle position restriction, you may find removing that will help, but otherwise as said a final drive ratio change will help with getting there faster, however this will still entail revving the nuts off it. Quote
Richf Posted November 16, 2015 Posted November 16, 2015 If the HR still has the std throttle position restriction, you may find removing that will help, but otherwise as said a final drive ratio change will help with getting there faster, however this will still entail revving the nuts off it. think you lose cruise control if you change the diff ratio, you do on the 370 otherwise i'd do it tomorrow its massively over geared Quote
Luke350 Posted November 16, 2015 Author Posted November 16, 2015 (edited) Over geared is definitely the way to describe it. If you're sat at 35, and needed to be on full chat you would have to do a big blip of the throttle as you downshifted to 1st! Because 2nd would leave you with around 20mph to pull through before on full chat. Not practical at all. Sent from my iPhone using Tapatalk Edited November 16, 2015 by Luke350 Quote
Roscoe Posted November 16, 2015 Posted November 16, 2015 Have an uprev on my standard HR doesn't really make it any quicker through the lower range. The only way to go if you want more POWER is supercharger or turbo... Quote
Luke350 Posted November 16, 2015 Author Posted November 16, 2015 I don't want more power roscoe. I want the HRs power, but at a more accessible Rev range. Sent from my iPhone using Tapatalk Quote
Roscoe Posted November 16, 2015 Posted November 16, 2015 I know what you mean I've found this before that it can drop out the power band going through the gears by about 500 rpm or so. As standard the 350 is a gt car so better for mile munching. It would help changing the final drive ratio. Quote
Grundy Posted November 16, 2015 Posted November 16, 2015 Over geared is definitely the way to describe it. If you're sat at 35, and needed to be on full chat you would have to do a big blip of the throttle as you downshifted to 1st! Because 2nd would leave you with around 20mph to pull through before on full chat. Not practical at all. Sent from my iPhone using Tapatalk Can't think of any scenario's where this is needed :S Not even on track... I don't want more power roscoe. I want the HRs power, but at a more accessible Rev range. Sent from my iPhone using Tapatalk 350z aren't a super quick car /thread 1 Quote
Luke350 Posted November 16, 2015 Author Posted November 16, 2015 I don't want a super quick car either. I've had one. I want the HRs speed at 5,500-7,500 but at a more accessible Rev range. Just to save downshifting into crazy low gears just to stop being humiliated by slower cars. Sent from my iPhone using Tapatalk Quote
H1979 Posted November 16, 2015 Posted November 16, 2015 I wouldn't worry about being humiliated by slower cars and just enjoy the z for what it is. Trying to out do other cars on the road will only lead to trouble sooner or later anyway. Quote
Bodyboarder81 Posted November 16, 2015 Posted November 16, 2015 It's a GT car and is geared so . Almost all hot hatches are as quick if not quicker than the zed . Put a nice exhaust on it and just enjoy the fruity v6 noises Quote
Richf Posted November 16, 2015 Posted November 16, 2015 Welcome to normally aspirated engines, you need to be in the right gear Quote
Jetpilot Posted November 16, 2015 Posted November 16, 2015 (edited) At the risk of teaching you to suck eggs buddy, i reckon your just used to the kick from the turbo off the Impreza when it made full boost probably around mid to 3/4 revs, all cars make their hp at the top end and in an n/a there is going to be no noticeable jump in power, its just very linear. My torque curve on my v3 charged zed is near flat and i absolutely love it compared to my Rx7 which was like an on off switch with the way the power was made. In regard to your other thread about gear speeds, maybe swap out the diff to a lower final drive as it perhaps the gearing that is the all round issue here. I dont know if its possible 100% (sure it is) to swap out to an auto diff they are a lower final drive and might make the gearing more suited to what you want. There is also a case for swapping out to a single mass flywheel and decats, it will certainly rev a bit quicker with those Much more responsive. Edited November 16, 2015 by Jetpilot Quote
Richf Posted November 16, 2015 Posted November 16, 2015 Its thats surge of torque you get from a turbo car , it makes it "feel" quicker, if you watch the speedometer go up you can see the zed isnt slow its just much less dramatic 1 Quote
Luke350 Posted November 16, 2015 Author Posted November 16, 2015 Ha. I have 3 diesels already 😂 yes true the torque can make things feel faster especially when it comes in a big lump. I'll get used to it I supposed. I had a Celica Tsport that had lift (like vtech) and that need to be spanked to come alive. But at least that only did 35 in 1st and 60 in 2nd! Sent from my iPhone using Tapatalk 1 Quote
H1979 Posted November 16, 2015 Posted November 16, 2015 Ha. I have 3 diesels already 😂 yes true the torque can make things feel faster especially when it comes in a big lump. I'll get used to it I supposed. I had a Celica Tsport that had lift (like vtech) and that need to be spanked to come alive. But at least that only did 35 in 1st and 60 in 2nd! Sent from my iPhone using Tapatalk I had the corolla tsport with the same engine, used to love taking that the 8200 redline with the punch at 6200. 1 Quote
BobbyZ Posted November 16, 2015 Posted November 16, 2015 On a slightly more serious note than my last post, I actually think that the spread of torque is very good on my HR. It's true that the gearing is on the long side, but I've never felt that the engine feels overcome by it. Of course, if you've come from a fast turbo (which I seem to remember you have) then you won't get the same punch as the turbo kicks in, and it's also true that I'd welcome more power across the whole rev range, but that's life... Quote
Luke350 Posted November 16, 2015 Author Posted November 16, 2015 Ye it seems to specifically be a HR problem. Quite hard to explain. Especially when the engine pulls and sounds amazing at any speed in any gear. But one of the reasons a payed a premium for a HR engine is to have the extra power. Which it definitely has IF you drive it right. Maybe it'll just take to to master it. I was just hoping there was an easy fix where a guy could plug his laptop in, click a few buttons and bring the power down to a more useable level. Or at least mess with ratios so 2nd gear is hitting a much more uniformed 60mph. Sent from my iPhone using Tapatalk Quote
Richf Posted November 16, 2015 Posted November 16, 2015 You can't change the gear ratios with a laptop Quote
Jetpilot Posted November 17, 2015 Posted November 17, 2015 Or at least mess with ratios so 2nd gear is hitting a much more uniformed 60mph As mentioned above, swap out you diff to change gearing. Try the lower ratio auto diff, will be cheap (if doable). Quote
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