g200wa

bad 44u · Post by **bad 44u** » 05 Apr 2007, 14:32

I think i looked this up a couple years ago and found the wa were put out more power can anyone confirm this and if its true what was done different to the g200w

Post by **IZU069** » 20 May 2008, 16:20

Maybe they had the L1 cams? Maybe WA = DOHC Australia = HDT => L1 cams? Just kidding, but noting that as I stated elsewhere, I believe L1s were used by HDT their Rally Geminis (fairly definitely) and circuit racers. But the L1s are also the cams used for the 2x45DCOE 220+HP G200W setup. (I know another poster said L1s were "mild" and not worth getting, but I was told they are a race cam and too lumpy for road use except for G-W engines.)

As to Isuzu engines that put out more power, it reminds me of some old Isuzu engine where the Jap version killed the local versions. I found nothing in specs and assumed it was in the ECU. I don't think it was the Piazza G200W as I have some info (see below).

Another hotty was the "dark green" DOHC engine which I thought was G180W (as opposed to the G180W light green & late blues) but I'm thinking now that they were G160W.
Anyhow, they came out in 117s and one other model that I can't recall - maybe Florian (because I think all Bellett GTRs had the black G160W, and Gemini ZZR etc had the blue G180W. I think it was carby but maybe it was an EFI).
I found nothing in specs other than compression (from memory 10.5; nothing indicated different cams).

[The following corrected 2Jun08. Sorry for previously stating that the 180HP was G200W with turbo - it was a G200 SOHC turbo.]
As to the Piazza G200Ws, exports were usually 135HP.
But there were SOHC 180HP Jap releases with an IHI RHB52-TC turbo with intercooler & electronic wastegate, and its CompRatio was 8.2:1 (vs 9:1 for G200W 135HP and 8.8:1 for G200 SOHC 120HP). Cam data unknown.
Its transmission also changed to Isuzu's common "sporty" gearing (Bellett GT, Gemini ZZR, '86 Piazza etc) and was 3.174; 1,963; 1.364; 1.000; 0.775; (rev) 3.402 (sporty being the 2nd & 3rd ratios).
(versus 135HP Piazza) 3.312; 2.054; 1.400; 1.000; 0.840; (rev) 3.550).

archangel62 · Post by **archangel62** » 02 Jun 2008, 05:06

The Isu twincams CAME OUT turbo?

That's so damn awesome, man I wish it was 1988, and I was dumping a G200W turbo in a ZZ/R Gemini... That'd eat just about anything on the street.

Post by **elky** » 02 Jun 2008, 21:41

nah dont think so....my jap piazza sales brohcures would of said so

maybe gettin confused with the 4xe1 turbo i reckons

tho it could b true

Post by **IZU069** » 02 Jun 2008, 23:45

Ooops - me booboo again!
The Piazza 180HP was an SOHC (not DOHC) with turbo as stated. I misread the literature. Sorry. I'll re-edit the above.
Cool. I too thought Isuzu did NOT have turbo'd G-W engines.
FYI - there was also a Florian Aska (1985) # 150HP but this was also a SOHC EFI turbo.

archangel62 · Post by **archangel62** » 03 Jun 2008, 03:53

It's strange that Isuzu went to the effort of designing a twincam, and developing a turbo, but never made a twincam turbo. I guess cost and market demands are a bitch.

That said, I guess it's also kinda stupid that CDT went to the effort of turbocharging a SOHC carby motor, rather than starting with the *right* engine

Post by **elky** » 03 Jun 2008, 16:18

the Wa motor was based on really old block design , from a era where "turbo" meant rocket and it was on trucks that turbo's were starting to get made in any decent numbers

hence y they did not make a turbo one (offically)

the RB (JT 150 series) introduced the sohc turbo then later on in the JT 190 series the dohc turbo

Post by **IZU069** » 03 Jun 2008, 17:39

A lot may have been politics too. We never saw their 4200 V6 released, nor their coolant-free ceramics, nor their hi-density batteries.
The W's could achieve hi power with simple mods (eg G200W way over 200HP) but as above, it was a mid-1960's design and suited for RWD.
They did their G-series SOHC turbo thing but probably after that needed a new design for the FWD series.
Instead of G-W turbos, they turbo'd the DOHC RBs and later Gems (FWD & AWD).
They also developed their diesels to produce the only "Tokyo approved" vehicles, and the first common rail. (Hey Hummer!)
And of course they ceased producing passenger cars after the early 90's for political reasons.
But now that the politics has been solved......?