Rtek post your mods & explain what your experiencing

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Jul 23, 2007 | 06:54 PM

mzrx7man

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sideways!!

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From: Nampa, Idaho

post your mods & explain what your experiencing

i heard someone mentioning to do this and i figured what the hell, anything to get to the bottom of this. everyone post your yr make & model & all your mods that have been done. also explain what problems you are having and at what rpm.

88 rx7 tII

s5 streetported motor
4 - 720's
rtek 2.0
walbro 255lph
3 in exhaust
all smog removed
to4b hybrid turbo
ssautocrap manifold
ext wg

when my rx7 is cold, it runs great, no hesitations what so ever. as soon as it gets warmer it hesitates. the hotter it gets the more it hesitates. when it surges the afr's get around 14-16. when it gets 90+ degrees outside it hesitated even taking off the line all the way to 4k rpm. after that boost picks up and it runs fine.

Jul 30, 2007 | 10:08 PM

turbo2ltr

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From: ..

You're supposed to do that here.
https://www.rx7club.com/rtek-forum-168/do-you-have-secondary-transition-stumble-666391/

Please read the directions and post appropriately.

Aug 4, 2007 | 09:32 PM

gxl90rx7

destroy, rebuild, repeat

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From: Charleston, SC

Quote:

Originally Posted by mzrx7man

is it ok if the trailing timing is in the negative. im running my timing conservatively and the split is about where its supposed to be.

the reason why i ask is ive been having a fair amount of hesitation under vacuum and very low boost. it feels like im riding a damn horse. it goes away when boost builds. anyone had this.

I believe mzrx7man was referring to the high vacuum/low rpm hesitations a few of us have been experiencing, not the staging hesitations. i get the hesitations around 2k-3k rpm in vacuum (nowhere near zero boost, so not staging). Here are my mods and stuff ive tried:

88 TII

stock s4 block
new RC high imp 750cc primaries
new RC low imp 1000cc secondaries (6.2 ohm injectors inline)
rtek 2.0
walbro 255lph
3 in exhaust
cold intake
all smog removed, no bac, tb mod
stock S5 turbo
fmic
ecu regrounded and all stock grounds cleaned
all engine ecu connectors cleaned
new o2
new plugs
new plug wires
no tps spikes
1/32" boost restricter in boost sensor line
relocated battery (2 gauge wiring, grounded to body in LH bin)
happens on both 550/720 and 720/720 presets
+15% fuel correction makes no difference
slightly modified timing map (smoothed out stock settings and have no negative split)
i think it started happening after installing the new injectors (RC engineering), but i dont really remember if it happened before
happens more in low gears, low load, both cold and warm engine

some logs:

https://www.rx7club.com/attachment.p...1&d=1183836057

https://www.rx7club.com/attachment.p...2&d=1183836057

Last edited by gxl90rx7; Aug 4, 2007 at 09:45 PM.