Um I dont get it...
Why do people with EGRs block them, and people with out EGR'* put them on?
EGR stands for Exhaust Gas Recirculation. So what do you think it does? It recirculates exhaust through the engine. Is exhaust clean...no. The exhaust makes the blower, intake manifold, etc... in the engine dirty. So if you block it off none of that will be dirty anymore. We removed it on the GTP to keep the intercooler clean because according to Zooomer with the EGR connected the Intercooler core needs to be cleaned every 10,000 miles, without the EGR connected it only needs to be cleaned every 50-100,000 miles. A HUGE difference. So basically you take it off to keep the engine clean.
ZZP says it messes with your gas mileage...anyone have an idea why?
Because what does you exhaust have left in it...a little bit of fuel. When the exhaust is recirculated the engine can use the little amount of fuel it didn't use before over again, so you would get better gas mileage, not much better but a little bit. We didn't notice a loss in gas mileage at all in the GTP for some reason, if anything we noticed a gain. I wouldn't worry too much about it.
1990 Maroon Grand Prix STE McLaren 3.1 Intercooled Turbo, 14.695 @ 94.49 on 12psi before cam/heads/etc.
1990 Bright Red Grand Prix McLaren 3.1 Intercooled Turbo, 14.819 @ 92.72, 189whp
1999 Grand Prix GT 9.75:1|K&N|160 tstat|No Ubend/Cat/Res|UD Pulleys|Ported M90/TB/Heads|XPZ|2.55"|Pacesetters|Stage 2 I/C. 12.442 @ 112.78
2000 Blue Bonneville SSEi Supercharged Gutted Airbox|K&N|3.4"|1.9'*|WP Pulley|Custom DHP|180*stat|41932'*|No Cat. 14.681 @ 94.80
2002 Dark Cherry Grand Prix GTP Supercharged & Intercooled
12.084 @ 114.38 w/1.743 60', 315.6whp, Fastest Stock Cam M90 GTP!
NOW XP CAMMED, 340.6whp with XP, stock heads, Gen 3 M90, 11.984 @ 115.84 w/1.750 60'!
Most HP Stock Heads Gen 3 M90 GTP!
2004 Red Monte SS Supercharged K&N|3.4 Pulley|1.9'*|180*stat|41919 plugs|3" dp|No cat/ubend|DHP|Shift Kit. 14.2 @ 98
GOT BOOST??? Friends dont let friends drive stock!